/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-bc289cb [2022-01-28 14:48:21,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-28 14:48:21,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-28 14:48:22,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-28 14:48:22,057 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-01-28 14:48:22,081 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-28 14:48:22,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-28 14:48:22,082 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-28 14:48:22,082 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-28 14:48:22,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-28 14:48:22,083 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-28 14:48:22,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-28 14:48:22,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-28 14:48:22,083 INFO L138 SettingsManager]: * Use SBE=true [2022-01-28 14:48:22,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-28 14:48:22,084 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-28 14:48:22,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-28 14:48:22,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-28 14:48:22,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-28 14:48:22,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-28 14:48:22,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-28 14:48:22,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-28 14:48:22,085 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-28 14:48:22,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-28 14:48:22,085 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-28 14:48:22,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-28 14:48:22,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-28 14:48:22,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-28 14:48:22,085 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-28 14:48:22,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-28 14:48:22,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 14:48:22,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-28 14:48:22,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-28 14:48:22,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-28 14:48:22,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-28 14:48:22,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-28 14:48:22,087 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-28 14:48:22,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-28 14:48:22,087 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-28 14:48:22,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-28 14:48:22,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-28 14:48:22,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-28 14:48:22,287 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-28 14:48:22,288 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-28 14:48:22,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl [2022-01-28 14:48:22,289 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl' [2022-01-28 14:48:22,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-28 14:48:22,309 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-28 14:48:22,311 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-28 14:48:22,311 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-28 14:48:22,311 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-28 14:48:22,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:48:22" (1/1) ... [2022-01-28 14:48:22,324 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:48:22" (1/1) ... [2022-01-28 14:48:22,328 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-28 14:48:22,329 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-28 14:48:22,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-28 14:48:22,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-28 14:48:22,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-28 14:48:22,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:48:22" (1/1) ... [2022-01-28 14:48:22,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:48:22" (1/1) ... [2022-01-28 14:48:22,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:48:22" (1/1) ... [2022-01-28 14:48:22,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:48:22" (1/1) ... [2022-01-28 14:48:22,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:48:22" (1/1) ... [2022-01-28 14:48:22,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:48:22" (1/1) ... [2022-01-28 14:48:22,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:48:22" (1/1) ... [2022-01-28 14:48:22,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-28 14:48:22,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-28 14:48:22,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-28 14:48:22,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-28 14:48:22,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:48:22" (1/1) ... [2022-01-28 14:48:22,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 14:48:22,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:48:22,368 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-28 14:48:22,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-28 14:48:22,401 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-28 14:48:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-28 14:48:22,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-28 14:48:22,402 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-28 14:48:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-28 14:48:22,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-28 14:48:22,402 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-28 14:48:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-28 14:48:22,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-28 14:48:22,402 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-28 14:48:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-28 14:48:22,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-28 14:48:22,403 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-28 14:48:22,437 INFO L234 CfgBuilder]: Building ICFG [2022-01-28 14:48:22,438 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-28 14:48:22,522 INFO L275 CfgBuilder]: Performing block encoding [2022-01-28 14:48:22,550 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-28 14:48:22,550 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-28 14:48:22,552 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:48:22 BoogieIcfgContainer [2022-01-28 14:48:22,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-28 14:48:22,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-28 14:48:22,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-28 14:48:22,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-28 14:48:22,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:48:22" (1/2) ... [2022-01-28 14:48:22,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5175f35 and model type chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 02:48:22, skipping insertion in model container [2022-01-28 14:48:22,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:48:22" (2/2) ... [2022-01-28 14:48:22,565 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-subst.wvr.bpl [2022-01-28 14:48:22,569 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-28 14:48:22,570 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-28 14:48:22,570 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-28 14:48:22,570 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-28 14:48:22,607 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-28 14:48:22,659 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-28 14:48:22,676 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-28 14:48:22,676 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-28 14:48:22,698 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2022-01-28 14:48:22,724 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:22,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:22,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-28 14:48:22,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:22,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:22,733 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:22,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:22,737 INFO L85 PathProgramCache]: Analyzing trace with hash 322758138, now seen corresponding path program 1 times [2022-01-28 14:48:22,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:22,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155283678] [2022-01-28 14:48:22,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:22,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:48:22,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:22,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155283678] [2022-01-28 14:48:22,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155283678] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:48:22,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:48:22,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 14:48:22,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087022001] [2022-01-28 14:48:22,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:48:22,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 14:48:22,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:22,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 14:48:22,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-28 14:48:22,913 INFO L87 Difference]: Start difference. First operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:22,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:22,993 INFO L93 Difference]: Finished difference Result 248 states and 694 transitions. [2022-01-28 14:48:22,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 14:48:22,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-28 14:48:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:23,009 INFO L225 Difference]: With dead ends: 248 [2022-01-28 14:48:23,009 INFO L226 Difference]: Without dead ends: 248 [2022-01-28 14:48:23,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-28 14:48:23,016 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:23,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:48:23,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-28 14:48:23,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 129. [2022-01-28 14:48:23,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.9609375) internal successors, (379), 128 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 379 transitions. [2022-01-28 14:48:23,110 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 379 transitions. Word has length 17 [2022-01-28 14:48:23,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:23,111 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 379 transitions. [2022-01-28 14:48:23,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:23,112 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 379 transitions. [2022-01-28 14:48:23,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-28 14:48:23,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:23,115 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:23,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-28 14:48:23,115 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:23,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:23,118 INFO L85 PathProgramCache]: Analyzing trace with hash -515592662, now seen corresponding path program 2 times [2022-01-28 14:48:23,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:23,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227713976] [2022-01-28 14:48:23,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:23,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:48:23,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:23,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227713976] [2022-01-28 14:48:23,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227713976] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:48:23,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:48:23,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 14:48:23,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677973074] [2022-01-28 14:48:23,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:48:23,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 14:48:23,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:23,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 14:48:23,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-28 14:48:23,163 INFO L87 Difference]: Start difference. First operand 129 states and 379 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:23,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:23,224 INFO L93 Difference]: Finished difference Result 206 states and 576 transitions. [2022-01-28 14:48:23,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 14:48:23,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-28 14:48:23,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:23,225 INFO L225 Difference]: With dead ends: 206 [2022-01-28 14:48:23,225 INFO L226 Difference]: Without dead ends: 183 [2022-01-28 14:48:23,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-28 14:48:23,226 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:23,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 21 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:48:23,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-28 14:48:23,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2022-01-28 14:48:23,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:23,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2022-01-28 14:48:23,236 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2022-01-28 14:48:23,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:23,237 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2022-01-28 14:48:23,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:23,237 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2022-01-28 14:48:23,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-28 14:48:23,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:23,241 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:23,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-28 14:48:23,241 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:23,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:23,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1307213656, now seen corresponding path program 3 times [2022-01-28 14:48:23,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:23,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933479654] [2022-01-28 14:48:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:23,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:48:23,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:23,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933479654] [2022-01-28 14:48:23,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933479654] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:48:23,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:48:23,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 14:48:23,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419516623] [2022-01-28 14:48:23,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:48:23,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 14:48:23,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:23,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 14:48:23,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 14:48:23,291 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:23,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:23,345 INFO L93 Difference]: Finished difference Result 141 states and 406 transitions. [2022-01-28 14:48:23,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 14:48:23,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-28 14:48:23,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:23,348 INFO L225 Difference]: With dead ends: 141 [2022-01-28 14:48:23,348 INFO L226 Difference]: Without dead ends: 141 [2022-01-28 14:48:23,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:48:23,353 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:23,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 18 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:48:23,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-28 14:48:23,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2022-01-28 14:48:23,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:23,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2022-01-28 14:48:23,367 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2022-01-28 14:48:23,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:23,368 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2022-01-28 14:48:23,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:23,368 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2022-01-28 14:48:23,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-28 14:48:23,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:23,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:23,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-28 14:48:23,370 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:23,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:23,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1230707719, now seen corresponding path program 1 times [2022-01-28 14:48:23,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:23,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592026200] [2022-01-28 14:48:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:23,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:48:23,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:23,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592026200] [2022-01-28 14:48:23,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592026200] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:48:23,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:48:23,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-28 14:48:23,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087830758] [2022-01-28 14:48:23,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:48:23,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 14:48:23,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:23,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 14:48:23,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:48:23,489 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:23,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:23,548 INFO L93 Difference]: Finished difference Result 265 states and 764 transitions. [2022-01-28 14:48:23,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 14:48:23,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-28 14:48:23,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:23,550 INFO L225 Difference]: With dead ends: 265 [2022-01-28 14:48:23,550 INFO L226 Difference]: Without dead ends: 238 [2022-01-28 14:48:23,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:48:23,551 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:23,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 22 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:48:23,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-28 14:48:23,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 178. [2022-01-28 14:48:23,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:23,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2022-01-28 14:48:23,557 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 18 [2022-01-28 14:48:23,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:23,557 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2022-01-28 14:48:23,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:23,557 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2022-01-28 14:48:23,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-28 14:48:23,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:23,558 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:23,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-28 14:48:23,558 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:23,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:23,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1661741005, now seen corresponding path program 2 times [2022-01-28 14:48:23,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:23,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750380132] [2022-01-28 14:48:23,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:23,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:48:23,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:23,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750380132] [2022-01-28 14:48:23,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750380132] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:48:23,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:48:23,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-28 14:48:23,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656789003] [2022-01-28 14:48:23,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:48:23,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 14:48:23,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:23,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 14:48:23,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:48:23,645 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:23,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:23,790 INFO L93 Difference]: Finished difference Result 372 states and 1056 transitions. [2022-01-28 14:48:23,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:48:23,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-28 14:48:23,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:23,793 INFO L225 Difference]: With dead ends: 372 [2022-01-28 14:48:23,793 INFO L226 Difference]: Without dead ends: 345 [2022-01-28 14:48:23,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:48:23,799 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:23,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 38 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:48:23,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-01-28 14:48:23,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 195. [2022-01-28 14:48:23,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0412371134020617) internal successors, (590), 194 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:23,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 590 transitions. [2022-01-28 14:48:23,808 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 590 transitions. Word has length 18 [2022-01-28 14:48:23,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:23,808 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 590 transitions. [2022-01-28 14:48:23,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:23,808 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 590 transitions. [2022-01-28 14:48:23,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-28 14:48:23,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:23,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:23,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-28 14:48:23,809 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:23,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:23,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1646280209, now seen corresponding path program 3 times [2022-01-28 14:48:23,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:23,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651715274] [2022-01-28 14:48:23,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:23,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:48:23,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:23,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651715274] [2022-01-28 14:48:23,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651715274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:48:23,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:48:23,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-28 14:48:23,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209439613] [2022-01-28 14:48:23,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:48:23,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 14:48:23,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:23,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 14:48:23,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:48:23,890 INFO L87 Difference]: Start difference. First operand 195 states and 590 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:24,012 INFO L93 Difference]: Finished difference Result 372 states and 1031 transitions. [2022-01-28 14:48:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:48:24,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-28 14:48:24,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:24,016 INFO L225 Difference]: With dead ends: 372 [2022-01-28 14:48:24,017 INFO L226 Difference]: Without dead ends: 332 [2022-01-28 14:48:24,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:48:24,017 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:24,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:48:24,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-01-28 14:48:24,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 195. [2022-01-28 14:48:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0103092783505154) internal successors, (584), 194 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 584 transitions. [2022-01-28 14:48:24,024 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 584 transitions. Word has length 18 [2022-01-28 14:48:24,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:24,024 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 584 transitions. [2022-01-28 14:48:24,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 584 transitions. [2022-01-28 14:48:24,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-28 14:48:24,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:24,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:24,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-28 14:48:24,040 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:24,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:24,041 INFO L85 PathProgramCache]: Analyzing trace with hash 414579593, now seen corresponding path program 4 times [2022-01-28 14:48:24,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:24,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632141615] [2022-01-28 14:48:24,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:24,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:48:24,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:24,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632141615] [2022-01-28 14:48:24,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632141615] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:48:24,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:48:24,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-28 14:48:24,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166523192] [2022-01-28 14:48:24,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:48:24,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 14:48:24,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:24,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 14:48:24,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:48:24,110 INFO L87 Difference]: Start difference. First operand 195 states and 584 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:24,201 INFO L93 Difference]: Finished difference Result 318 states and 896 transitions. [2022-01-28 14:48:24,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:48:24,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-28 14:48:24,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:24,202 INFO L225 Difference]: With dead ends: 318 [2022-01-28 14:48:24,203 INFO L226 Difference]: Without dead ends: 255 [2022-01-28 14:48:24,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:48:24,203 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:24,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 31 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:48:24,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-01-28 14:48:24,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 195. [2022-01-28 14:48:24,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9536082474226806) internal successors, (573), 194 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 573 transitions. [2022-01-28 14:48:24,209 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 573 transitions. Word has length 18 [2022-01-28 14:48:24,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:24,209 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 573 transitions. [2022-01-28 14:48:24,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,210 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 573 transitions. [2022-01-28 14:48:24,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 14:48:24,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:24,210 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:24,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-28 14:48:24,211 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:24,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:24,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1321939015, now seen corresponding path program 1 times [2022-01-28 14:48:24,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:24,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602880914] [2022-01-28 14:48:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:24,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:48:24,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:24,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602880914] [2022-01-28 14:48:24,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602880914] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:48:24,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:48:24,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 14:48:24,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817499427] [2022-01-28 14:48:24,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:48:24,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:48:24,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:24,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:48:24,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:48:24,238 INFO L87 Difference]: Start difference. First operand 195 states and 573 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:24,282 INFO L93 Difference]: Finished difference Result 285 states and 816 transitions. [2022-01-28 14:48:24,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:48:24,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 14:48:24,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:24,283 INFO L225 Difference]: With dead ends: 285 [2022-01-28 14:48:24,283 INFO L226 Difference]: Without dead ends: 261 [2022-01-28 14:48:24,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:48:24,284 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 28 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:24,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:48:24,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-28 14:48:24,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 183. [2022-01-28 14:48:24,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2022-01-28 14:48:24,290 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2022-01-28 14:48:24,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:24,290 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2022-01-28 14:48:24,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,290 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2022-01-28 14:48:24,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 14:48:24,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:24,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:24,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-28 14:48:24,291 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:24,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:24,291 INFO L85 PathProgramCache]: Analyzing trace with hash 170737749, now seen corresponding path program 1 times [2022-01-28 14:48:24,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:24,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713930367] [2022-01-28 14:48:24,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:24,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:48:24,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:24,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713930367] [2022-01-28 14:48:24,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713930367] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:48:24,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:48:24,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 14:48:24,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938827232] [2022-01-28 14:48:24,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:48:24,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:48:24,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:24,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:48:24,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:48:24,317 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:24,364 INFO L93 Difference]: Finished difference Result 279 states and 816 transitions. [2022-01-28 14:48:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:48:24,364 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 14:48:24,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:24,366 INFO L225 Difference]: With dead ends: 279 [2022-01-28 14:48:24,366 INFO L226 Difference]: Without dead ends: 279 [2022-01-28 14:48:24,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:48:24,366 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:24,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 33 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:48:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-28 14:48:24,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 183. [2022-01-28 14:48:24,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2022-01-28 14:48:24,372 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2022-01-28 14:48:24,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:24,372 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2022-01-28 14:48:24,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,372 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2022-01-28 14:48:24,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 14:48:24,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:24,373 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:24,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-28 14:48:24,373 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:24,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:24,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1862125575, now seen corresponding path program 2 times [2022-01-28 14:48:24,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:24,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021107131] [2022-01-28 14:48:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:24,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:48:24,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:24,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021107131] [2022-01-28 14:48:24,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021107131] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:48:24,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:48:24,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 14:48:24,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567096878] [2022-01-28 14:48:24,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:48:24,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:48:24,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:24,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:48:24,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:48:24,404 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:24,462 INFO L93 Difference]: Finished difference Result 333 states and 939 transitions. [2022-01-28 14:48:24,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:48:24,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 14:48:24,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:24,464 INFO L225 Difference]: With dead ends: 333 [2022-01-28 14:48:24,464 INFO L226 Difference]: Without dead ends: 321 [2022-01-28 14:48:24,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:48:24,465 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:24,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 30 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:48:24,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-01-28 14:48:24,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 201. [2022-01-28 14:48:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.955) internal successors, (591), 200 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 591 transitions. [2022-01-28 14:48:24,470 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 591 transitions. Word has length 19 [2022-01-28 14:48:24,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:24,471 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 591 transitions. [2022-01-28 14:48:24,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,471 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 591 transitions. [2022-01-28 14:48:24,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 14:48:24,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:24,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:24,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-28 14:48:24,472 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:24,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:24,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1006568847, now seen corresponding path program 2 times [2022-01-28 14:48:24,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:24,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961793142] [2022-01-28 14:48:24,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:24,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:48:24,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:24,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961793142] [2022-01-28 14:48:24,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961793142] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:48:24,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:48:24,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 14:48:24,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596100107] [2022-01-28 14:48:24,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:48:24,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:48:24,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:24,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:48:24,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:48:24,506 INFO L87 Difference]: Start difference. First operand 201 states and 591 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:24,566 INFO L93 Difference]: Finished difference Result 297 states and 852 transitions. [2022-01-28 14:48:24,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:48:24,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 14:48:24,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:24,567 INFO L225 Difference]: With dead ends: 297 [2022-01-28 14:48:24,567 INFO L226 Difference]: Without dead ends: 297 [2022-01-28 14:48:24,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:48:24,568 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:24,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 30 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:48:24,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-28 14:48:24,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 201. [2022-01-28 14:48:24,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.955) internal successors, (591), 200 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 591 transitions. [2022-01-28 14:48:24,573 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 591 transitions. Word has length 19 [2022-01-28 14:48:24,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:24,574 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 591 transitions. [2022-01-28 14:48:24,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,574 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 591 transitions. [2022-01-28 14:48:24,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 14:48:24,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:24,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:24,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-28 14:48:24,575 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:24,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:24,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1593484449, now seen corresponding path program 3 times [2022-01-28 14:48:24,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:24,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40727040] [2022-01-28 14:48:24,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:24,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:48:24,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:24,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40727040] [2022-01-28 14:48:24,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40727040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:48:24,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:48:24,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 14:48:24,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385780256] [2022-01-28 14:48:24,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:48:24,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:48:24,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:24,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:48:24,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:48:24,600 INFO L87 Difference]: Start difference. First operand 201 states and 591 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:24,641 INFO L93 Difference]: Finished difference Result 219 states and 632 transitions. [2022-01-28 14:48:24,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:48:24,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 14:48:24,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:24,643 INFO L225 Difference]: With dead ends: 219 [2022-01-28 14:48:24,643 INFO L226 Difference]: Without dead ends: 206 [2022-01-28 14:48:24,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:48:24,643 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:24,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 21 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:48:24,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-28 14:48:24,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 188. [2022-01-28 14:48:24,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9572192513368982) internal successors, (553), 187 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 553 transitions. [2022-01-28 14:48:24,648 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 553 transitions. Word has length 19 [2022-01-28 14:48:24,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:24,648 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 553 transitions. [2022-01-28 14:48:24,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,648 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 553 transitions. [2022-01-28 14:48:24,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 14:48:24,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:24,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:24,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-28 14:48:24,649 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:24,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:24,649 INFO L85 PathProgramCache]: Analyzing trace with hash -353547893, now seen corresponding path program 3 times [2022-01-28 14:48:24,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:24,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939669961] [2022-01-28 14:48:24,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:24,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:48:24,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:24,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939669961] [2022-01-28 14:48:24,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939669961] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:48:24,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:48:24,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 14:48:24,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288970935] [2022-01-28 14:48:24,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:48:24,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:48:24,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:24,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:48:24,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:48:24,679 INFO L87 Difference]: Start difference. First operand 188 states and 553 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:24,727 INFO L93 Difference]: Finished difference Result 267 states and 774 transitions. [2022-01-28 14:48:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:48:24,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 14:48:24,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:24,729 INFO L225 Difference]: With dead ends: 267 [2022-01-28 14:48:24,729 INFO L226 Difference]: Without dead ends: 267 [2022-01-28 14:48:24,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:48:24,729 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:24,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 29 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:48:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-01-28 14:48:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 189. [2022-01-28 14:48:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-01-28 14:48:24,740 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2022-01-28 14:48:24,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:24,740 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-01-28 14:48:24,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-01-28 14:48:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 14:48:24,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:24,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:24,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-28 14:48:24,741 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:24,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:24,742 INFO L85 PathProgramCache]: Analyzing trace with hash 844809037, now seen corresponding path program 4 times [2022-01-28 14:48:24,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:24,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921756323] [2022-01-28 14:48:24,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:24,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:48:24,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:24,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921756323] [2022-01-28 14:48:24,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921756323] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:48:24,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:48:24,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 14:48:24,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231326885] [2022-01-28 14:48:24,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:48:24,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:48:24,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:24,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:48:24,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:48:24,773 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:24,829 INFO L93 Difference]: Finished difference Result 207 states and 591 transitions. [2022-01-28 14:48:24,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:48:24,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 14:48:24,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:24,830 INFO L225 Difference]: With dead ends: 207 [2022-01-28 14:48:24,830 INFO L226 Difference]: Without dead ends: 195 [2022-01-28 14:48:24,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:48:24,831 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:24,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 29 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:48:24,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-28 14:48:24,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-01-28 14:48:24,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.922680412371134) internal successors, (567), 194 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 567 transitions. [2022-01-28 14:48:24,836 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 567 transitions. Word has length 19 [2022-01-28 14:48:24,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:24,836 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 567 transitions. [2022-01-28 14:48:24,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,836 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 567 transitions. [2022-01-28 14:48:24,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 14:48:24,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:24,837 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:24,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-28 14:48:24,837 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:24,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:24,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1370864431, now seen corresponding path program 5 times [2022-01-28 14:48:24,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:24,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625824583] [2022-01-28 14:48:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:24,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:48:24,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:24,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625824583] [2022-01-28 14:48:24,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625824583] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:48:24,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:48:24,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 14:48:24,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739770353] [2022-01-28 14:48:24,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:48:24,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:48:24,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:24,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:48:24,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:48:24,886 INFO L87 Difference]: Start difference. First operand 195 states and 567 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:24,940 INFO L93 Difference]: Finished difference Result 214 states and 623 transitions. [2022-01-28 14:48:24,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:48:24,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 14:48:24,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:24,941 INFO L225 Difference]: With dead ends: 214 [2022-01-28 14:48:24,941 INFO L226 Difference]: Without dead ends: 214 [2022-01-28 14:48:24,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:48:24,942 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:24,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:48:24,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-28 14:48:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 189. [2022-01-28 14:48:24,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-01-28 14:48:24,946 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2022-01-28 14:48:24,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:24,946 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-01-28 14:48:24,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:24,946 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-01-28 14:48:24,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 14:48:24,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:24,947 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:24,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-28 14:48:24,947 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:24,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:24,947 INFO L85 PathProgramCache]: Analyzing trace with hash -297779051, now seen corresponding path program 6 times [2022-01-28 14:48:24,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:24,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951433599] [2022-01-28 14:48:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:24,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:48:24,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:24,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951433599] [2022-01-28 14:48:24,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951433599] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:48:24,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:48:24,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 14:48:24,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809083861] [2022-01-28 14:48:24,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:48:24,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:48:24,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:24,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:48:24,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:48:24,974 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:25,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:25,030 INFO L93 Difference]: Finished difference Result 208 states and 605 transitions. [2022-01-28 14:48:25,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:48:25,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 14:48:25,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:25,032 INFO L225 Difference]: With dead ends: 208 [2022-01-28 14:48:25,032 INFO L226 Difference]: Without dead ends: 208 [2022-01-28 14:48:25,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:48:25,032 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:25,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 33 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:48:25,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-28 14:48:25,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 189. [2022-01-28 14:48:25,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:25,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-01-28 14:48:25,036 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2022-01-28 14:48:25,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:25,036 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-01-28 14:48:25,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-01-28 14:48:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:48:25,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:25,037 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:25,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-28 14:48:25,037 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:25,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:25,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1817075563, now seen corresponding path program 1 times [2022-01-28 14:48:25,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:25,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864779896] [2022-01-28 14:48:25,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:25,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:48:25,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:25,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864779896] [2022-01-28 14:48:25,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864779896] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:48:25,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652257410] [2022-01-28 14:48:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:25,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:25,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:48:25,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:48:25,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-28 14:48:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:25,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 14:48:25,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:48:25,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:48:25,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:48:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:48:25,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652257410] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:48:25,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:48:25,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-28 14:48:25,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183543942] [2022-01-28 14:48:25,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:48:25,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 14:48:25,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:25,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 14:48:25,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:48:25,466 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:25,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:25,640 INFO L93 Difference]: Finished difference Result 561 states and 1635 transitions. [2022-01-28 14:48:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:48:25,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-28 14:48:25,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:25,642 INFO L225 Difference]: With dead ends: 561 [2022-01-28 14:48:25,642 INFO L226 Difference]: Without dead ends: 282 [2022-01-28 14:48:25,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-01-28 14:48:25,642 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:25,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 44 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:48:25,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-01-28 14:48:25,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2022-01-28 14:48:25,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.9359430604982206) internal successors, (825), 281 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 825 transitions. [2022-01-28 14:48:25,648 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 825 transitions. Word has length 20 [2022-01-28 14:48:25,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:25,648 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 825 transitions. [2022-01-28 14:48:25,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:25,648 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 825 transitions. [2022-01-28 14:48:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-28 14:48:25,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:25,649 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:25,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-28 14:48:25,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-28 14:48:25,850 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:25,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:25,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1806041876, now seen corresponding path program 2 times [2022-01-28 14:48:25,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:25,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147258427] [2022-01-28 14:48:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:25,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:48:25,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:25,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147258427] [2022-01-28 14:48:25,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147258427] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:48:25,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063310546] [2022-01-28 14:48:25,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:48:25,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:25,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:48:25,911 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:48:25,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-28 14:48:25,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:48:25,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:48:25,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-28 14:48:25,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:48:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:48:26,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:48:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:48:26,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063310546] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:48:26,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:48:26,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-01-28 14:48:26,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400691413] [2022-01-28 14:48:26,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:48:26,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 14:48:26,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:26,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 14:48:26,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-28 14:48:26,180 INFO L87 Difference]: Start difference. First operand 282 states and 825 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:26,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:26,389 INFO L93 Difference]: Finished difference Result 406 states and 1187 transitions. [2022-01-28 14:48:26,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-28 14:48:26,389 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-28 14:48:26,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:26,391 INFO L225 Difference]: With dead ends: 406 [2022-01-28 14:48:26,391 INFO L226 Difference]: Without dead ends: 313 [2022-01-28 14:48:26,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:48:26,391 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 115 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:26,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 52 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:48:26,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-01-28 14:48:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2022-01-28 14:48:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.9391025641025643) internal successors, (917), 312 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:26,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 917 transitions. [2022-01-28 14:48:26,397 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 917 transitions. Word has length 23 [2022-01-28 14:48:26,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:26,397 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 917 transitions. [2022-01-28 14:48:26,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:26,398 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 917 transitions. [2022-01-28 14:48:26,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:48:26,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:26,398 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:26,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-28 14:48:26,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-28 14:48:26,599 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:26,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:26,600 INFO L85 PathProgramCache]: Analyzing trace with hash 140853163, now seen corresponding path program 3 times [2022-01-28 14:48:26,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:26,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759476337] [2022-01-28 14:48:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:26,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:48:26,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:26,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759476337] [2022-01-28 14:48:26,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759476337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:48:26,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212191733] [2022-01-28 14:48:26,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:48:26,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:26,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:48:26,791 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:48:26,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-28 14:48:26,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:48:26,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:48:26,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:48:26,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:48:26,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:48:26,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:48:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:48:27,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:48:27,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:48:27,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2022-01-28 14:48:27,556 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:48:27,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:48:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:48:27,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212191733] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:48:27,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:48:27,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-28 14:48:27,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623775145] [2022-01-28 14:48:27,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:48:27,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 14:48:27,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:27,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 14:48:27,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:48:27,562 INFO L87 Difference]: Start difference. First operand 313 states and 917 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:28,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:28,241 INFO L93 Difference]: Finished difference Result 607 states and 1751 transitions. [2022-01-28 14:48:28,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:48:28,241 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:48:28,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:28,243 INFO L225 Difference]: With dead ends: 607 [2022-01-28 14:48:28,243 INFO L226 Difference]: Without dead ends: 545 [2022-01-28 14:48:28,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:48:28,244 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 144 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:28,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 210 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:48:28,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-01-28 14:48:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 369. [2022-01-28 14:48:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 2.9864130434782608) internal successors, (1099), 368 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1099 transitions. [2022-01-28 14:48:28,252 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1099 transitions. Word has length 24 [2022-01-28 14:48:28,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:28,252 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1099 transitions. [2022-01-28 14:48:28,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1099 transitions. [2022-01-28 14:48:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:48:28,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:28,253 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:28,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-28 14:48:28,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:28,470 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:28,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:28,471 INFO L85 PathProgramCache]: Analyzing trace with hash 281813425, now seen corresponding path program 4 times [2022-01-28 14:48:28,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:28,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539317792] [2022-01-28 14:48:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:28,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:48:28,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:28,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539317792] [2022-01-28 14:48:28,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539317792] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:48:28,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718600082] [2022-01-28 14:48:28,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:48:28,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:28,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:48:28,635 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:48:28,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-28 14:48:28,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:48:28,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:48:28,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:48:28,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:48:28,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:48:28,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:48:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:48:28,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:48:29,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:48:29,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:48:29,472 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:48:29,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-28 14:48:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:48:29,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718600082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:48:29,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:48:29,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-28 14:48:29,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215658811] [2022-01-28 14:48:29,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:48:29,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 14:48:29,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:29,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 14:48:29,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:48:29,488 INFO L87 Difference]: Start difference. First operand 369 states and 1099 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:29,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:29,884 INFO L93 Difference]: Finished difference Result 493 states and 1465 transitions. [2022-01-28 14:48:29,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:48:29,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:48:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:29,887 INFO L225 Difference]: With dead ends: 493 [2022-01-28 14:48:29,887 INFO L226 Difference]: Without dead ends: 462 [2022-01-28 14:48:29,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:48:29,888 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:29,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 209 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:48:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-01-28 14:48:29,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 383. [2022-01-28 14:48:29,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.005235602094241) internal successors, (1148), 382 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:29,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1148 transitions. [2022-01-28 14:48:29,896 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1148 transitions. Word has length 24 [2022-01-28 14:48:29,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:29,897 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1148 transitions. [2022-01-28 14:48:29,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:29,897 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1148 transitions. [2022-01-28 14:48:29,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:48:29,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:29,898 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:29,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-28 14:48:30,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:30,115 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:30,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:30,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1933860043, now seen corresponding path program 5 times [2022-01-28 14:48:30,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:30,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633337968] [2022-01-28 14:48:30,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:30,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:48:30,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:30,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633337968] [2022-01-28 14:48:30,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633337968] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:48:30,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011834354] [2022-01-28 14:48:30,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:48:30,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:30,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:48:30,289 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:48:30,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-28 14:48:30,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:48:30,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:48:30,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:48:30,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:48:30,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:48:30,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:48:30,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:48:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:48:30,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:48:30,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:48:30,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:48:31,083 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:48:31,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-28 14:48:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:48:31,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011834354] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:48:31,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:48:31,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-01-28 14:48:31,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685330618] [2022-01-28 14:48:31,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:48:31,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:48:31,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:31,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:48:31,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:48:31,087 INFO L87 Difference]: Start difference. First operand 383 states and 1148 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:31,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:31,601 INFO L93 Difference]: Finished difference Result 529 states and 1572 transitions. [2022-01-28 14:48:31,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:48:31,601 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:48:31,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:31,603 INFO L225 Difference]: With dead ends: 529 [2022-01-28 14:48:31,603 INFO L226 Difference]: Without dead ends: 483 [2022-01-28 14:48:31,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:48:31,604 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 119 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:31,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 235 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:48:31,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-28 14:48:31,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 390. [2022-01-28 14:48:31,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0231362467866325) internal successors, (1176), 389 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:31,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1176 transitions. [2022-01-28 14:48:31,612 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1176 transitions. Word has length 24 [2022-01-28 14:48:31,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:31,612 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1176 transitions. [2022-01-28 14:48:31,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:31,612 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1176 transitions. [2022-01-28 14:48:31,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:48:31,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:31,613 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:31,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-28 14:48:31,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:31,830 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:31,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:31,830 INFO L85 PathProgramCache]: Analyzing trace with hash 212310717, now seen corresponding path program 6 times [2022-01-28 14:48:31,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:31,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924170135] [2022-01-28 14:48:31,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:31,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:48:31,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:31,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924170135] [2022-01-28 14:48:31,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924170135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:48:31,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097233760] [2022-01-28 14:48:31,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:48:31,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:31,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:48:31,957 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:48:31,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-28 14:48:31,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:48:31,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:48:31,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:48:31,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:48:32,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:48:32,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:48:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:48:32,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:48:32,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:48:32,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:48:32,712 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:48:32,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:48:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:48:32,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097233760] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:48:32,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:48:32,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-01-28 14:48:32,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146367300] [2022-01-28 14:48:32,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:48:32,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:48:32,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:32,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:48:32,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:48:32,718 INFO L87 Difference]: Start difference. First operand 390 states and 1176 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:33,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:33,083 INFO L93 Difference]: Finished difference Result 508 states and 1523 transitions. [2022-01-28 14:48:33,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:48:33,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:48:33,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:33,086 INFO L225 Difference]: With dead ends: 508 [2022-01-28 14:48:33,086 INFO L226 Difference]: Without dead ends: 477 [2022-01-28 14:48:33,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:48:33,086 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 124 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:33,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 181 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:48:33,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-01-28 14:48:33,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 412. [2022-01-28 14:48:33,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.019464720194647) internal successors, (1241), 411 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1241 transitions. [2022-01-28 14:48:33,094 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1241 transitions. Word has length 24 [2022-01-28 14:48:33,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:33,094 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1241 transitions. [2022-01-28 14:48:33,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:33,095 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1241 transitions. [2022-01-28 14:48:33,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:48:33,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:33,096 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:33,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-28 14:48:33,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:33,310 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:33,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:33,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1190228181, now seen corresponding path program 7 times [2022-01-28 14:48:33,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:33,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093833520] [2022-01-28 14:48:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:33,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:33,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:33,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093833520] [2022-01-28 14:48:33,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093833520] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:48:33,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236785120] [2022-01-28 14:48:33,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:48:33,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:33,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:48:33,446 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:48:33,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-28 14:48:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:33,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:48:33,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:48:33,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:48:33,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:48:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:33,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:48:34,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:48:34,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:48:34,219 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:48:34,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:48:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:34,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236785120] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:48:34,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:48:34,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-01-28 14:48:34,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511946408] [2022-01-28 14:48:34,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:48:34,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:48:34,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:34,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:48:34,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:48:34,225 INFO L87 Difference]: Start difference. First operand 412 states and 1241 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:34,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:34,744 INFO L93 Difference]: Finished difference Result 548 states and 1644 transitions. [2022-01-28 14:48:34,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:48:34,744 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:48:34,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:34,746 INFO L225 Difference]: With dead ends: 548 [2022-01-28 14:48:34,746 INFO L226 Difference]: Without dead ends: 517 [2022-01-28 14:48:34,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:48:34,747 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 125 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:34,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 207 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:48:34,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-28 14:48:34,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 439. [2022-01-28 14:48:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.0342465753424657) internal successors, (1329), 438 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:34,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1329 transitions. [2022-01-28 14:48:34,755 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1329 transitions. Word has length 24 [2022-01-28 14:48:34,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:34,755 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1329 transitions. [2022-01-28 14:48:34,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:34,755 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1329 transitions. [2022-01-28 14:48:34,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:48:34,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:34,756 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:34,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-28 14:48:34,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:34,972 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:34,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:34,973 INFO L85 PathProgramCache]: Analyzing trace with hash 889065647, now seen corresponding path program 8 times [2022-01-28 14:48:34,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:34,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764081883] [2022-01-28 14:48:34,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:34,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:35,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:35,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764081883] [2022-01-28 14:48:35,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764081883] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:48:35,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637886270] [2022-01-28 14:48:35,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:48:35,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:35,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:48:35,105 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:48:35,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-28 14:48:35,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:48:35,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:48:35,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:48:35,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:48:35,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:48:35,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:48:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:35,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:48:35,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:48:35,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:48:35,878 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:48:35,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:48:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:35,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637886270] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:48:35,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:48:35,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-01-28 14:48:35,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781041303] [2022-01-28 14:48:35,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:48:35,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:48:35,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:35,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:48:35,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:48:35,883 INFO L87 Difference]: Start difference. First operand 439 states and 1329 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:36,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:36,214 INFO L93 Difference]: Finished difference Result 562 states and 1679 transitions. [2022-01-28 14:48:36,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:48:36,214 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:48:36,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:36,216 INFO L225 Difference]: With dead ends: 562 [2022-01-28 14:48:36,216 INFO L226 Difference]: Without dead ends: 531 [2022-01-28 14:48:36,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:48:36,217 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 116 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:36,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 196 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:48:36,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-01-28 14:48:36,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 432. [2022-01-28 14:48:36,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.0185614849187936) internal successors, (1301), 431 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:36,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1301 transitions. [2022-01-28 14:48:36,225 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1301 transitions. Word has length 24 [2022-01-28 14:48:36,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:36,225 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1301 transitions. [2022-01-28 14:48:36,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:36,225 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1301 transitions. [2022-01-28 14:48:36,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:48:36,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:36,226 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:36,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-28 14:48:36,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-28 14:48:36,439 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:36,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:36,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1259730889, now seen corresponding path program 9 times [2022-01-28 14:48:36,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:36,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818110669] [2022-01-28 14:48:36,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:36,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:36,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:36,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818110669] [2022-01-28 14:48:36,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818110669] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:48:36,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899188548] [2022-01-28 14:48:36,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:48:36,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:36,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:48:36,634 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:48:36,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-28 14:48:36,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:48:36,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:48:36,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:48:36,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:48:36,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:48:36,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:48:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:36,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:48:37,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:48:37,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:48:37,323 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:48:37,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:48:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:37,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899188548] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:48:37,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:48:37,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-28 14:48:37,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804395411] [2022-01-28 14:48:37,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:48:37,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:48:37,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:37,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:48:37,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:48:37,328 INFO L87 Difference]: Start difference. First operand 432 states and 1301 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:37,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:37,741 INFO L93 Difference]: Finished difference Result 549 states and 1646 transitions. [2022-01-28 14:48:37,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:48:37,741 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:48:37,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:37,743 INFO L225 Difference]: With dead ends: 549 [2022-01-28 14:48:37,743 INFO L226 Difference]: Without dead ends: 518 [2022-01-28 14:48:37,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:48:37,744 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 106 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:37,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 241 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:48:37,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-28 14:48:37,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 432. [2022-01-28 14:48:37,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.0185614849187936) internal successors, (1301), 431 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:37,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1301 transitions. [2022-01-28 14:48:37,751 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1301 transitions. Word has length 24 [2022-01-28 14:48:37,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:37,752 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1301 transitions. [2022-01-28 14:48:37,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:37,752 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1301 transitions. [2022-01-28 14:48:37,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:48:37,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:37,753 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:37,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-28 14:48:37,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-28 14:48:37,967 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:37,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:37,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1941144819, now seen corresponding path program 10 times [2022-01-28 14:48:37,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:37,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883112363] [2022-01-28 14:48:37,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:37,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:38,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:38,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883112363] [2022-01-28 14:48:38,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883112363] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:48:38,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073793087] [2022-01-28 14:48:38,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:48:38,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:38,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:48:38,126 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:48:38,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-28 14:48:38,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:48:38,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:48:38,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:48:38,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:48:38,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:48:38,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:48:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:38,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:48:38,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:48:38,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2022-01-28 14:48:38,957 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:48:38,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:48:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:38,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073793087] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:48:38,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:48:38,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-01-28 14:48:38,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075549984] [2022-01-28 14:48:38,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:48:38,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:48:38,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:38,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:48:38,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:48:38,963 INFO L87 Difference]: Start difference. First operand 432 states and 1301 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:39,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:39,664 INFO L93 Difference]: Finished difference Result 807 states and 2357 transitions. [2022-01-28 14:48:39,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:48:39,664 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:48:39,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:39,667 INFO L225 Difference]: With dead ends: 807 [2022-01-28 14:48:39,667 INFO L226 Difference]: Without dead ends: 700 [2022-01-28 14:48:39,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:48:39,668 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 170 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:39,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 281 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:48:39,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-01-28 14:48:39,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 486. [2022-01-28 14:48:39,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 3.043298969072165) internal successors, (1476), 485 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:39,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1476 transitions. [2022-01-28 14:48:39,677 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1476 transitions. Word has length 24 [2022-01-28 14:48:39,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:39,677 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1476 transitions. [2022-01-28 14:48:39,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:39,677 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1476 transitions. [2022-01-28 14:48:39,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:48:39,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:39,678 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:39,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-28 14:48:39,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-28 14:48:39,891 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:39,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:39,892 INFO L85 PathProgramCache]: Analyzing trace with hash 542857643, now seen corresponding path program 11 times [2022-01-28 14:48:39,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:39,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333161598] [2022-01-28 14:48:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:39,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:40,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:40,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333161598] [2022-01-28 14:48:40,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333161598] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:48:40,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806918857] [2022-01-28 14:48:40,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:48:40,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:40,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:48:40,060 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:48:40,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-28 14:48:40,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:48:40,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:48:40,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:48:40,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:48:40,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:48:40,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:48:40,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:48:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:40,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:48:40,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:48:40,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2022-01-28 14:48:40,878 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:48:40,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:48:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:40,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806918857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:48:40,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:48:40,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:48:40,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313101658] [2022-01-28 14:48:40,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:48:40,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:48:40,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:40,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:48:40,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:48:40,886 INFO L87 Difference]: Start difference. First operand 486 states and 1476 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:41,925 INFO L93 Difference]: Finished difference Result 1105 states and 3255 transitions. [2022-01-28 14:48:41,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:48:41,925 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:48:41,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:41,929 INFO L225 Difference]: With dead ends: 1105 [2022-01-28 14:48:41,929 INFO L226 Difference]: Without dead ends: 1047 [2022-01-28 14:48:41,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 14:48:41,930 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 265 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:41,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 291 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:48:41,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-01-28 14:48:41,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 506. [2022-01-28 14:48:41,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.0495049504950495) internal successors, (1540), 505 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:41,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1540 transitions. [2022-01-28 14:48:41,941 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1540 transitions. Word has length 24 [2022-01-28 14:48:41,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:41,941 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1540 transitions. [2022-01-28 14:48:41,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:41,941 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1540 transitions. [2022-01-28 14:48:41,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:48:41,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:41,942 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:41,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-28 14:48:42,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-28 14:48:42,159 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:42,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:42,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1559402575, now seen corresponding path program 12 times [2022-01-28 14:48:42,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:42,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651768398] [2022-01-28 14:48:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:42,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:42,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:42,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651768398] [2022-01-28 14:48:42,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651768398] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:48:42,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804142203] [2022-01-28 14:48:42,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:48:42,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:42,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:48:42,348 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:48:42,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-28 14:48:42,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:48:42,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:48:42,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:48:42,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:48:42,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:48:42,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:48:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:42,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:48:43,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:48:43,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-01-28 14:48:43,286 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:48:43,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:48:43,290 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:43,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804142203] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:48:43,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:48:43,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:48:43,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518808598] [2022-01-28 14:48:43,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:48:43,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:48:43,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:43,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:48:43,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:48:43,291 INFO L87 Difference]: Start difference. First operand 506 states and 1540 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:45,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:45,418 INFO L93 Difference]: Finished difference Result 1201 states and 3497 transitions. [2022-01-28 14:48:45,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-28 14:48:45,419 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:48:45,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:45,422 INFO L225 Difference]: With dead ends: 1201 [2022-01-28 14:48:45,423 INFO L226 Difference]: Without dead ends: 1056 [2022-01-28 14:48:45,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2022-01-28 14:48:45,423 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 237 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:45,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 390 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:48:45,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-01-28 14:48:45,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 554. [2022-01-28 14:48:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 3.0144665461121156) internal successors, (1667), 553 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1667 transitions. [2022-01-28 14:48:45,435 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1667 transitions. Word has length 24 [2022-01-28 14:48:45,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:45,436 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1667 transitions. [2022-01-28 14:48:45,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:45,436 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1667 transitions. [2022-01-28 14:48:45,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:48:45,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:45,437 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:45,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-28 14:48:45,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-28 14:48:45,656 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:45,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:45,657 INFO L85 PathProgramCache]: Analyzing trace with hash -395469401, now seen corresponding path program 13 times [2022-01-28 14:48:45,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:45,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159549073] [2022-01-28 14:48:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:45,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:45,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:45,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159549073] [2022-01-28 14:48:45,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159549073] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:48:45,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099489562] [2022-01-28 14:48:45,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:48:45,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:45,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:48:45,866 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:48:45,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-28 14:48:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:45,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:48:45,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:48:45,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:48:46,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:48:46,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:48:46,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:48:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:46,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:48:46,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:48:46,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-01-28 14:48:46,912 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:48:46,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:48:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:46,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099489562] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:48:46,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:48:46,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:48:46,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899114303] [2022-01-28 14:48:46,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:48:46,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:48:46,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:46,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:48:46,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:48:46,918 INFO L87 Difference]: Start difference. First operand 554 states and 1667 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:50,553 INFO L93 Difference]: Finished difference Result 1830 states and 5027 transitions. [2022-01-28 14:48:50,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-28 14:48:50,554 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:48:50,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:50,559 INFO L225 Difference]: With dead ends: 1830 [2022-01-28 14:48:50,560 INFO L226 Difference]: Without dead ends: 1618 [2022-01-28 14:48:50,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=816, Invalid=3606, Unknown=0, NotChecked=0, Total=4422 [2022-01-28 14:48:50,561 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 367 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:50,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 539 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1621 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 14:48:50,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2022-01-28 14:48:50,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 575. [2022-01-28 14:48:50,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 3.057491289198606) internal successors, (1755), 574 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1755 transitions. [2022-01-28 14:48:50,577 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1755 transitions. Word has length 24 [2022-01-28 14:48:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:50,577 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 1755 transitions. [2022-01-28 14:48:50,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1755 transitions. [2022-01-28 14:48:50,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:48:50,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:50,596 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:50,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-28 14:48:50,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-28 14:48:50,803 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:50,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1939707733, now seen corresponding path program 14 times [2022-01-28 14:48:50,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:50,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831098084] [2022-01-28 14:48:50,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:50,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:48:50,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:50,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831098084] [2022-01-28 14:48:50,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831098084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:48:50,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306493043] [2022-01-28 14:48:50,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:48:50,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:50,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:48:50,986 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:48:50,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-28 14:48:51,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:48:51,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:48:51,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:48:51,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:48:51,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:48:51,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:48:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:48:51,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:48:51,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:48:51,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-01-28 14:48:51,917 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:48:51,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:48:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:48:51,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306493043] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:48:51,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:48:51,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:48:51,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900413951] [2022-01-28 14:48:51,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:48:51,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:48:51,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:51,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:48:51,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:48:51,922 INFO L87 Difference]: Start difference. First operand 575 states and 1755 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:53,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:53,435 INFO L93 Difference]: Finished difference Result 1909 states and 5454 transitions. [2022-01-28 14:48:53,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-28 14:48:53,436 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:48:53,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:53,442 INFO L225 Difference]: With dead ends: 1909 [2022-01-28 14:48:53,442 INFO L226 Difference]: Without dead ends: 1683 [2022-01-28 14:48:53,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=419, Invalid=1651, Unknown=0, NotChecked=0, Total=2070 [2022-01-28 14:48:53,443 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 318 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:53,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 339 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:48:53,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2022-01-28 14:48:53,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 605. [2022-01-28 14:48:53,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.0546357615894038) internal successors, (1845), 604 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:53,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1845 transitions. [2022-01-28 14:48:53,460 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1845 transitions. Word has length 24 [2022-01-28 14:48:53,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:53,460 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 1845 transitions. [2022-01-28 14:48:53,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:53,460 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1845 transitions. [2022-01-28 14:48:53,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:48:53,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:53,461 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:53,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-28 14:48:53,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:53,678 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:53,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:53,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1047496429, now seen corresponding path program 15 times [2022-01-28 14:48:53,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:53,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183482635] [2022-01-28 14:48:53,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:53,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:53,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:53,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183482635] [2022-01-28 14:48:53,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183482635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:48:53,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225363309] [2022-01-28 14:48:53,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:48:53,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:53,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:48:53,864 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:48:53,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-28 14:48:53,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:48:53,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:48:53,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:48:53,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:48:54,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:48:54,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:48:54,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:48:54,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:48:54,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:48:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:54,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:48:54,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:48:54,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-01-28 14:48:54,973 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:48:54,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:48:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:54,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225363309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:48:54,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:48:54,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:48:54,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710251785] [2022-01-28 14:48:54,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:48:54,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:48:54,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:54,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:48:54,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:48:54,982 INFO L87 Difference]: Start difference. First operand 605 states and 1845 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:56,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:56,085 INFO L93 Difference]: Finished difference Result 957 states and 2734 transitions. [2022-01-28 14:48:56,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:48:56,085 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:48:56,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:56,088 INFO L225 Difference]: With dead ends: 957 [2022-01-28 14:48:56,088 INFO L226 Difference]: Without dead ends: 828 [2022-01-28 14:48:56,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=206, Invalid=1126, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 14:48:56,089 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 190 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:56,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 380 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 712 Invalid, 0 Unknown, 161 Unchecked, 0.3s Time] [2022-01-28 14:48:56,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-01-28 14:48:56,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 634. [2022-01-28 14:48:56,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 3.0489731437598735) internal successors, (1930), 633 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:56,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1930 transitions. [2022-01-28 14:48:56,099 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1930 transitions. Word has length 24 [2022-01-28 14:48:56,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:56,099 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1930 transitions. [2022-01-28 14:48:56,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:56,100 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1930 transitions. [2022-01-28 14:48:56,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:48:56,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:56,101 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:56,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-28 14:48:56,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:56,314 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:56,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:56,314 INFO L85 PathProgramCache]: Analyzing trace with hash 2011775409, now seen corresponding path program 16 times [2022-01-28 14:48:56,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:56,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216706657] [2022-01-28 14:48:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:56,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:56,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:56,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216706657] [2022-01-28 14:48:56,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216706657] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:48:56,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404901492] [2022-01-28 14:48:56,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:48:56,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:56,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:48:56,503 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:48:56,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-28 14:48:56,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:48:56,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:48:56,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:48:56,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:48:56,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:48:56,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:48:56,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:48:56,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:48:56,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-28 14:48:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:56,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:48:57,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:48:57,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-01-28 14:48:57,597 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:48:57,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:48:57,602 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:57,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404901492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:48:57,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:48:57,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:48:57,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650811805] [2022-01-28 14:48:57,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:48:57,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:48:57,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:57,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:48:57,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:48:57,604 INFO L87 Difference]: Start difference. First operand 634 states and 1930 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:57,851 INFO L93 Difference]: Finished difference Result 767 states and 2303 transitions. [2022-01-28 14:48:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:48:57,851 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:48:57,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:57,854 INFO L225 Difference]: With dead ends: 767 [2022-01-28 14:48:57,854 INFO L226 Difference]: Without dead ends: 722 [2022-01-28 14:48:57,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:48:57,854 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:57,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 203 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 455 Invalid, 0 Unknown, 184 Unchecked, 0.2s Time] [2022-01-28 14:48:57,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-01-28 14:48:57,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 643. [2022-01-28 14:48:57,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 3.054517133956386) internal successors, (1961), 642 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1961 transitions. [2022-01-28 14:48:57,864 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1961 transitions. Word has length 24 [2022-01-28 14:48:57,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:57,864 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 1961 transitions. [2022-01-28 14:48:57,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:57,864 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1961 transitions. [2022-01-28 14:48:57,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:48:57,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:57,865 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:57,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-28 14:48:58,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:58,079 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:48:58,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:48:58,080 INFO L85 PathProgramCache]: Analyzing trace with hash -957667723, now seen corresponding path program 17 times [2022-01-28 14:48:58,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:48:58,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113967023] [2022-01-28 14:48:58,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:48:58,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:48:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:48:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:58,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:48:58,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113967023] [2022-01-28 14:48:58,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113967023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:48:58,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198701982] [2022-01-28 14:48:58,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:48:58,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:48:58,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:48:58,285 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:48:58,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-28 14:48:58,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:48:58,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:48:58,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:48:58,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:48:58,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:48:58,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:48:58,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:48:58,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:48:58,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:48:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:58,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:48:59,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:48:59,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2022-01-28 14:48:59,566 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:48:59,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:48:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:48:59,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198701982] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:48:59,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:48:59,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:48:59,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886384669] [2022-01-28 14:48:59,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:48:59,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:48:59,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:48:59,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:48:59,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:48:59,573 INFO L87 Difference]: Start difference. First operand 643 states and 1961 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:59,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:48:59,765 INFO L93 Difference]: Finished difference Result 745 states and 2260 transitions. [2022-01-28 14:48:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:48:59,766 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:48:59,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:48:59,768 INFO L225 Difference]: With dead ends: 745 [2022-01-28 14:48:59,768 INFO L226 Difference]: Without dead ends: 714 [2022-01-28 14:48:59,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:48:59,769 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 81 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:48:59,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 198 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 437 Invalid, 0 Unknown, 237 Unchecked, 0.2s Time] [2022-01-28 14:48:59,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-01-28 14:48:59,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 637. [2022-01-28 14:48:59,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.0455974842767297) internal successors, (1937), 636 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:59,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1937 transitions. [2022-01-28 14:48:59,783 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1937 transitions. Word has length 24 [2022-01-28 14:48:59,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:48:59,783 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1937 transitions. [2022-01-28 14:48:59,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:48:59,783 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1937 transitions. [2022-01-28 14:48:59,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:48:59,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:48:59,784 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:48:59,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:00,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:00,001 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:00,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:00,001 INFO L85 PathProgramCache]: Analyzing trace with hash -763823345, now seen corresponding path program 18 times [2022-01-28 14:49:00,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:00,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567950043] [2022-01-28 14:49:00,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:00,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:00,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:00,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567950043] [2022-01-28 14:49:00,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567950043] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:00,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697316912] [2022-01-28 14:49:00,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:49:00,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:00,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:00,235 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:00,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-28 14:49:00,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:49:00,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:00,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:49:00,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:00,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:00,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:00,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:00,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:49:00,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:49:00,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:49:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:00,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:01,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:01,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 55 [2022-01-28 14:49:01,396 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:01,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:49:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:01,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697316912] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:01,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:01,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:49:01,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161444698] [2022-01-28 14:49:01,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:01,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:49:01,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:01,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:49:01,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:49:01,402 INFO L87 Difference]: Start difference. First operand 637 states and 1937 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:04,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:04,037 INFO L93 Difference]: Finished difference Result 1731 states and 4672 transitions. [2022-01-28 14:49:04,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-28 14:49:04,038 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:04,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:04,041 INFO L225 Difference]: With dead ends: 1731 [2022-01-28 14:49:04,041 INFO L226 Difference]: Without dead ends: 1457 [2022-01-28 14:49:04,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=395, Invalid=2055, Unknown=0, NotChecked=0, Total=2450 [2022-01-28 14:49:04,042 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 417 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:04,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 473 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1139 Invalid, 0 Unknown, 314 Unchecked, 0.6s Time] [2022-01-28 14:49:04,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2022-01-28 14:49:04,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 666. [2022-01-28 14:49:04,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.088721804511278) internal successors, (2054), 665 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:04,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2054 transitions. [2022-01-28 14:49:04,058 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2054 transitions. Word has length 24 [2022-01-28 14:49:04,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:04,058 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 2054 transitions. [2022-01-28 14:49:04,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:04,058 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2054 transitions. [2022-01-28 14:49:04,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:04,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:04,060 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:04,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:04,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:04,276 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:04,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:04,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1470118745, now seen corresponding path program 19 times [2022-01-28 14:49:04,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:04,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578649399] [2022-01-28 14:49:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:04,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:49:04,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:04,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578649399] [2022-01-28 14:49:04,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578649399] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:04,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194911723] [2022-01-28 14:49:04,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:49:04,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:04,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:04,520 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:04,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-28 14:49:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:04,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:49:04,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:04,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:04,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:04,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:04,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:49:04,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:49:04,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:49:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:49:05,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:05,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:05,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 55 [2022-01-28 14:49:05,886 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:05,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:49:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:49:05,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194911723] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:05,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:05,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:49:05,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420428811] [2022-01-28 14:49:05,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:05,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:49:05,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:05,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:49:05,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:49:05,893 INFO L87 Difference]: Start difference. First operand 666 states and 2054 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:06,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:06,863 INFO L93 Difference]: Finished difference Result 1412 states and 3998 transitions. [2022-01-28 14:49:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:49:06,863 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:06,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:06,866 INFO L225 Difference]: With dead ends: 1412 [2022-01-28 14:49:06,866 INFO L226 Difference]: Without dead ends: 1196 [2022-01-28 14:49:06,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 14:49:06,867 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 201 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:06,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 400 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 634 Invalid, 0 Unknown, 219 Unchecked, 0.3s Time] [2022-01-28 14:49:06,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-01-28 14:49:06,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 686. [2022-01-28 14:49:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 3.1255474452554743) internal successors, (2141), 685 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 2141 transitions. [2022-01-28 14:49:06,879 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 2141 transitions. Word has length 24 [2022-01-28 14:49:06,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:06,879 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 2141 transitions. [2022-01-28 14:49:06,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:06,880 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 2141 transitions. [2022-01-28 14:49:06,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:06,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:06,881 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:06,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:07,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:07,091 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:07,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:07,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1720919203, now seen corresponding path program 20 times [2022-01-28 14:49:07,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:07,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061068529] [2022-01-28 14:49:07,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:07,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:07,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:07,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061068529] [2022-01-28 14:49:07,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061068529] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:07,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988393038] [2022-01-28 14:49:07,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:49:07,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:07,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:07,269 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:07,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-28 14:49:07,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:49:07,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:07,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:49:07,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:07,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:49:07,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:49:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:07,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:08,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:08,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2022-01-28 14:49:08,220 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:08,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:49:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:08,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988393038] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:08,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:08,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-01-28 14:49:08,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402321612] [2022-01-28 14:49:08,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:08,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:49:08,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:08,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:49:08,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:49:08,225 INFO L87 Difference]: Start difference. First operand 686 states and 2141 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:08,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:08,932 INFO L93 Difference]: Finished difference Result 1207 states and 3632 transitions. [2022-01-28 14:49:08,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:49:08,933 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:08,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:08,935 INFO L225 Difference]: With dead ends: 1207 [2022-01-28 14:49:08,935 INFO L226 Difference]: Without dead ends: 1113 [2022-01-28 14:49:08,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:49:08,936 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 148 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:08,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 252 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:49:08,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-01-28 14:49:08,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 684. [2022-01-28 14:49:08,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 3.102489019033675) internal successors, (2119), 683 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 2119 transitions. [2022-01-28 14:49:08,948 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 2119 transitions. Word has length 24 [2022-01-28 14:49:08,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:08,948 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 2119 transitions. [2022-01-28 14:49:08,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:08,948 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 2119 transitions. [2022-01-28 14:49:08,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:08,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:08,949 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:08,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:09,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-28 14:49:09,165 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:09,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:09,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1670091215, now seen corresponding path program 21 times [2022-01-28 14:49:09,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:09,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607280688] [2022-01-28 14:49:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:09,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:09,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:09,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607280688] [2022-01-28 14:49:09,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607280688] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:09,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223312322] [2022-01-28 14:49:09,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:49:09,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:09,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:09,335 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:09,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-28 14:49:09,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:49:09,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:09,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:49:09,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:09,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:49:09,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:09,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:49:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:09,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:09,949 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:09,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:49:10,192 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:10,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:49:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:10,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223312322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:10,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:10,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:49:10,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097272985] [2022-01-28 14:49:10,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:10,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:49:10,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:10,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:49:10,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:49:10,199 INFO L87 Difference]: Start difference. First operand 684 states and 2119 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:10,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:10,540 INFO L93 Difference]: Finished difference Result 920 states and 2799 transitions. [2022-01-28 14:49:10,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:49:10,541 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:10,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:10,542 INFO L225 Difference]: With dead ends: 920 [2022-01-28 14:49:10,542 INFO L226 Difference]: Without dead ends: 859 [2022-01-28 14:49:10,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:49:10,543 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 114 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:10,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 262 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 587 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2022-01-28 14:49:10,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-01-28 14:49:10,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 732. [2022-01-28 14:49:10,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 3.0711354309165526) internal successors, (2245), 731 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2245 transitions. [2022-01-28 14:49:10,554 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2245 transitions. Word has length 24 [2022-01-28 14:49:10,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:10,554 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2245 transitions. [2022-01-28 14:49:10,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:10,554 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2245 transitions. [2022-01-28 14:49:10,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:10,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:10,555 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:10,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:10,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-28 14:49:10,768 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:10,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:10,768 INFO L85 PathProgramCache]: Analyzing trace with hash 409202613, now seen corresponding path program 22 times [2022-01-28 14:49:10,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:10,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810834042] [2022-01-28 14:49:10,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:10,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:10,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:10,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810834042] [2022-01-28 14:49:10,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810834042] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:10,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759804880] [2022-01-28 14:49:10,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:49:10,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:10,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:10,881 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:10,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-28 14:49:10,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:49:10,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:10,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:49:10,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:11,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:49:11,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:49:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:11,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:11,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:11,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:49:11,686 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:11,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:49:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:11,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759804880] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:11,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:11,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:49:11,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642900076] [2022-01-28 14:49:11,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:11,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:49:11,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:11,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:49:11,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:49:11,691 INFO L87 Difference]: Start difference. First operand 732 states and 2245 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:12,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:12,083 INFO L93 Difference]: Finished difference Result 998 states and 3013 transitions. [2022-01-28 14:49:12,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:49:12,083 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:12,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:12,085 INFO L225 Difference]: With dead ends: 998 [2022-01-28 14:49:12,085 INFO L226 Difference]: Without dead ends: 940 [2022-01-28 14:49:12,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:49:12,086 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:12,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 228 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:49:12,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-01-28 14:49:12,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 719. [2022-01-28 14:49:12,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 3.0933147632311977) internal successors, (2221), 718 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:12,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2221 transitions. [2022-01-28 14:49:12,097 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2221 transitions. Word has length 24 [2022-01-28 14:49:12,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:12,097 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 2221 transitions. [2022-01-28 14:49:12,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:12,097 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2221 transitions. [2022-01-28 14:49:12,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:12,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:12,098 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:12,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:12,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-28 14:49:12,315 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:12,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:12,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1739593923, now seen corresponding path program 23 times [2022-01-28 14:49:12,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:12,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249600017] [2022-01-28 14:49:12,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:12,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:12,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:12,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249600017] [2022-01-28 14:49:12,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249600017] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:12,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623251797] [2022-01-28 14:49:12,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:49:12,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:12,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:12,420 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:12,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-28 14:49:12,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:49:12,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:12,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:49:12,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:12,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:49:12,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:49:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:12,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:12,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:12,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:49:13,145 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:13,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:49:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:13,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623251797] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:13,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:13,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-01-28 14:49:13,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887875788] [2022-01-28 14:49:13,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:13,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:49:13,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:13,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:49:13,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:49:13,149 INFO L87 Difference]: Start difference. First operand 719 states and 2221 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:13,461 INFO L93 Difference]: Finished difference Result 957 states and 2930 transitions. [2022-01-28 14:49:13,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:49:13,462 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:13,464 INFO L225 Difference]: With dead ends: 957 [2022-01-28 14:49:13,464 INFO L226 Difference]: Without dead ends: 926 [2022-01-28 14:49:13,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:49:13,464 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 100 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:13,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 176 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:49:13,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-01-28 14:49:13,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 719. [2022-01-28 14:49:13,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 3.0933147632311977) internal successors, (2221), 718 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:13,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2221 transitions. [2022-01-28 14:49:13,475 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2221 transitions. Word has length 24 [2022-01-28 14:49:13,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:13,475 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 2221 transitions. [2022-01-28 14:49:13,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:13,475 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2221 transitions. [2022-01-28 14:49:13,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:13,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:13,476 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:13,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:13,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:13,683 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:13,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:13,683 INFO L85 PathProgramCache]: Analyzing trace with hash 170403073, now seen corresponding path program 24 times [2022-01-28 14:49:13,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:13,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394071175] [2022-01-28 14:49:13,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:13,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:13,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:13,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394071175] [2022-01-28 14:49:13,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394071175] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:13,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276521332] [2022-01-28 14:49:13,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:49:13,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:13,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:13,862 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:13,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-28 14:49:13,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:49:13,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:13,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:49:13,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:13,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:14,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:49:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:14,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:14,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:14,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:49:14,864 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:14,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:49:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:14,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276521332] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:14,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:14,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:49:14,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208231294] [2022-01-28 14:49:14,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:14,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:49:14,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:14,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:49:14,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:49:14,869 INFO L87 Difference]: Start difference. First operand 719 states and 2221 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:15,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:15,819 INFO L93 Difference]: Finished difference Result 1043 states and 3139 transitions. [2022-01-28 14:49:15,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:49:15,820 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:15,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:15,822 INFO L225 Difference]: With dead ends: 1043 [2022-01-28 14:49:15,822 INFO L226 Difference]: Without dead ends: 923 [2022-01-28 14:49:15,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 14:49:15,823 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 140 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:15,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 242 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:49:15,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-01-28 14:49:15,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 758. [2022-01-28 14:49:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.096433289299868) internal successors, (2344), 757 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2344 transitions. [2022-01-28 14:49:15,833 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2344 transitions. Word has length 24 [2022-01-28 14:49:15,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:15,834 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2344 transitions. [2022-01-28 14:49:15,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:15,834 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2344 transitions. [2022-01-28 14:49:15,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:15,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:15,835 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:15,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:16,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-28 14:49:16,052 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:16,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:16,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1334336247, now seen corresponding path program 25 times [2022-01-28 14:49:16,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:16,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572921435] [2022-01-28 14:49:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:16,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:16,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:16,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572921435] [2022-01-28 14:49:16,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572921435] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:16,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424168850] [2022-01-28 14:49:16,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:49:16,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:16,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:16,228 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:16,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-28 14:49:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:16,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:49:16,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:16,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:16,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:16,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:49:16,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:16,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:49:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:16,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:17,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:17,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:49:17,301 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:17,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:49:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:17,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424168850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:17,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:17,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:49:17,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726632425] [2022-01-28 14:49:17,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:17,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:49:17,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:17,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:49:17,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:49:17,307 INFO L87 Difference]: Start difference. First operand 758 states and 2344 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:17,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:17,491 INFO L93 Difference]: Finished difference Result 869 states and 2670 transitions. [2022-01-28 14:49:17,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:49:17,491 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:17,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:17,493 INFO L225 Difference]: With dead ends: 869 [2022-01-28 14:49:17,493 INFO L226 Difference]: Without dead ends: 834 [2022-01-28 14:49:17,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:49:17,494 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:17,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 188 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 467 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2022-01-28 14:49:17,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-01-28 14:49:17,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 762. [2022-01-28 14:49:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.0932982917214193) internal successors, (2354), 761 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2354 transitions. [2022-01-28 14:49:17,504 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2354 transitions. Word has length 24 [2022-01-28 14:49:17,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:17,504 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 2354 transitions. [2022-01-28 14:49:17,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2354 transitions. [2022-01-28 14:49:17,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:17,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:17,505 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:17,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:17,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-01-28 14:49:17,709 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:17,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:17,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1591302115, now seen corresponding path program 26 times [2022-01-28 14:49:17,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:17,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766918664] [2022-01-28 14:49:17,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:17,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:17,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:17,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766918664] [2022-01-28 14:49:17,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766918664] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:17,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369742909] [2022-01-28 14:49:17,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:49:17,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:17,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:17,885 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:17,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-28 14:49:17,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:49:17,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:17,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:49:17,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:18,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:18,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:18,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:49:18,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:18,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:49:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:18,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:18,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:18,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:49:19,021 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:19,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:49:19,026 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:19,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369742909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:19,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:19,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:49:19,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466857115] [2022-01-28 14:49:19,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:19,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:49:19,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:19,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:49:19,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:49:19,027 INFO L87 Difference]: Start difference. First operand 762 states and 2354 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:19,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:19,204 INFO L93 Difference]: Finished difference Result 871 states and 2653 transitions. [2022-01-28 14:49:19,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:49:19,204 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:19,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:19,206 INFO L225 Difference]: With dead ends: 871 [2022-01-28 14:49:19,206 INFO L226 Difference]: Without dead ends: 812 [2022-01-28 14:49:19,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:49:19,207 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 74 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:19,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 141 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 320 Invalid, 0 Unknown, 225 Unchecked, 0.1s Time] [2022-01-28 14:49:19,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-01-28 14:49:19,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 769. [2022-01-28 14:49:19,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.0924479166666665) internal successors, (2375), 768 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:19,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2375 transitions. [2022-01-28 14:49:19,217 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2375 transitions. Word has length 24 [2022-01-28 14:49:19,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:19,217 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 2375 transitions. [2022-01-28 14:49:19,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:19,217 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2375 transitions. [2022-01-28 14:49:19,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:19,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:19,219 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:19,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:19,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-28 14:49:19,434 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:19,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:19,435 INFO L85 PathProgramCache]: Analyzing trace with hash 259722689, now seen corresponding path program 27 times [2022-01-28 14:49:19,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:19,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877350213] [2022-01-28 14:49:19,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:19,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:19,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:19,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877350213] [2022-01-28 14:49:19,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877350213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:19,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536179608] [2022-01-28 14:49:19,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:49:19,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:19,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:19,609 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:19,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-28 14:49:19,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:49:19,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:19,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:49:19,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:19,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:19,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:19,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:19,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:19,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:49:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:20,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:20,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:20,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2022-01-28 14:49:20,829 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:20,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:49:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:20,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536179608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:20,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:20,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:49:20,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146196431] [2022-01-28 14:49:20,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:20,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:49:20,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:20,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:49:20,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:49:20,835 INFO L87 Difference]: Start difference. First operand 769 states and 2375 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:21,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:21,593 INFO L93 Difference]: Finished difference Result 1143 states and 3370 transitions. [2022-01-28 14:49:21,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:49:21,594 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:21,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:21,596 INFO L225 Difference]: With dead ends: 1143 [2022-01-28 14:49:21,596 INFO L226 Difference]: Without dead ends: 1021 [2022-01-28 14:49:21,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:49:21,597 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 107 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:21,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 303 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 638 Invalid, 0 Unknown, 121 Unchecked, 0.3s Time] [2022-01-28 14:49:21,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-01-28 14:49:21,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 790. [2022-01-28 14:49:21,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 3.1077313054499367) internal successors, (2452), 789 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:21,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 2452 transitions. [2022-01-28 14:49:21,609 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 2452 transitions. Word has length 24 [2022-01-28 14:49:21,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:21,609 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 2452 transitions. [2022-01-28 14:49:21,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:21,609 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 2452 transitions. [2022-01-28 14:49:21,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:21,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:21,611 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:21,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:21,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:21,827 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:21,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:21,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1618009331, now seen corresponding path program 28 times [2022-01-28 14:49:21,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:21,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202226584] [2022-01-28 14:49:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:21,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:22,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:22,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202226584] [2022-01-28 14:49:22,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202226584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:22,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510507202] [2022-01-28 14:49:22,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:49:22,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:22,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:22,037 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:22,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-28 14:49:22,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:49:22,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:22,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:49:22,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:22,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:22,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:22,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:22,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:49:22,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:49:22,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:49:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:22,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:22,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:22,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:49:23,182 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:23,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:49:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:23,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510507202] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:23,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:23,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:49:23,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790938809] [2022-01-28 14:49:23,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:23,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:49:23,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:23,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:49:23,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:49:23,188 INFO L87 Difference]: Start difference. First operand 790 states and 2452 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:23,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:23,450 INFO L93 Difference]: Finished difference Result 881 states and 2722 transitions. [2022-01-28 14:49:23,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:49:23,450 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:23,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:23,452 INFO L225 Difference]: With dead ends: 881 [2022-01-28 14:49:23,452 INFO L226 Difference]: Without dead ends: 850 [2022-01-28 14:49:23,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:49:23,453 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 66 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 386 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:23,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 206 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 525 Invalid, 0 Unknown, 386 Unchecked, 0.2s Time] [2022-01-28 14:49:23,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-01-28 14:49:23,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 791. [2022-01-28 14:49:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 3.110126582278481) internal successors, (2457), 790 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:23,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2457 transitions. [2022-01-28 14:49:23,464 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2457 transitions. Word has length 24 [2022-01-28 14:49:23,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:23,464 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 2457 transitions. [2022-01-28 14:49:23,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:23,464 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2457 transitions. [2022-01-28 14:49:23,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:23,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:23,466 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:23,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:23,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:23,681 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:23,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:23,682 INFO L85 PathProgramCache]: Analyzing trace with hash 453567067, now seen corresponding path program 29 times [2022-01-28 14:49:23,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:23,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268901453] [2022-01-28 14:49:23,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:23,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:23,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:23,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268901453] [2022-01-28 14:49:23,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268901453] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:23,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623301083] [2022-01-28 14:49:23,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:49:23,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:23,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:23,901 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:23,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-28 14:49:23,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:49:23,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:23,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:49:23,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:24,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:24,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:24,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:49:24,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:24,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:49:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:24,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:24,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:24,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:49:24,942 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:24,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:49:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:24,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623301083] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:24,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:24,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:49:24,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807718537] [2022-01-28 14:49:24,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:24,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:49:24,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:24,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:49:24,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:49:24,948 INFO L87 Difference]: Start difference. First operand 791 states and 2457 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:26,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:26,161 INFO L93 Difference]: Finished difference Result 1058 states and 3093 transitions. [2022-01-28 14:49:26,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:49:26,161 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:26,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:26,163 INFO L225 Difference]: With dead ends: 1058 [2022-01-28 14:49:26,163 INFO L226 Difference]: Without dead ends: 918 [2022-01-28 14:49:26,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:49:26,164 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 158 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:26,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 245 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 667 Invalid, 0 Unknown, 274 Unchecked, 0.3s Time] [2022-01-28 14:49:26,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-01-28 14:49:26,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 797. [2022-01-28 14:49:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.1243718592964824) internal successors, (2487), 796 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:26,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2487 transitions. [2022-01-28 14:49:26,176 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2487 transitions. Word has length 24 [2022-01-28 14:49:26,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:26,176 INFO L470 AbstractCegarLoop]: Abstraction has 797 states and 2487 transitions. [2022-01-28 14:49:26,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:26,176 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2487 transitions. [2022-01-28 14:49:26,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:26,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:26,177 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:26,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:26,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:26,394 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:26,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:26,394 INFO L85 PathProgramCache]: Analyzing trace with hash -252728333, now seen corresponding path program 30 times [2022-01-28 14:49:26,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:26,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113205811] [2022-01-28 14:49:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:26,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:49:26,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:26,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113205811] [2022-01-28 14:49:26,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113205811] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:26,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763540150] [2022-01-28 14:49:26,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:49:26,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:26,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:26,603 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:26,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-28 14:49:26,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:49:26,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:26,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:49:26,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:26,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:26,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:26,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:26,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:49:26,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:49:26,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:49:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:49:27,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:27,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:27,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2022-01-28 14:49:27,809 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:27,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:49:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:49:27,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763540150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:27,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:27,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:49:27,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18377312] [2022-01-28 14:49:27,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:27,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:49:27,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:27,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:49:27,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:49:27,815 INFO L87 Difference]: Start difference. First operand 797 states and 2487 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:28,047 INFO L93 Difference]: Finished difference Result 930 states and 2849 transitions. [2022-01-28 14:49:28,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:49:28,047 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:28,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:28,049 INFO L225 Difference]: With dead ends: 930 [2022-01-28 14:49:28,049 INFO L226 Difference]: Without dead ends: 892 [2022-01-28 14:49:28,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:49:28,050 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 73 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:28,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 197 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 475 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-01-28 14:49:28,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-01-28 14:49:28,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 798. [2022-01-28 14:49:28,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.1267252195734003) internal successors, (2492), 797 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:28,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2492 transitions. [2022-01-28 14:49:28,061 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2492 transitions. Word has length 24 [2022-01-28 14:49:28,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:28,061 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 2492 transitions. [2022-01-28 14:49:28,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:28,061 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2492 transitions. [2022-01-28 14:49:28,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:28,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:28,063 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:28,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:28,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-28 14:49:28,263 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:28,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:28,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1186027797, now seen corresponding path program 31 times [2022-01-28 14:49:28,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:28,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497217252] [2022-01-28 14:49:28,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:28,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:28,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:28,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497217252] [2022-01-28 14:49:28,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497217252] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:28,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407179797] [2022-01-28 14:49:28,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:49:28,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:28,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:28,422 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:28,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-28 14:49:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:28,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:49:28,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:28,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:49:28,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:49:28,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:28,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:29,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:29,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:49:29,426 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:29,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:49:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:29,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407179797] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:29,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:29,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:49:29,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180875903] [2022-01-28 14:49:29,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:29,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:49:29,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:29,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:49:29,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:49:29,431 INFO L87 Difference]: Start difference. First operand 798 states and 2492 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:30,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:30,029 INFO L93 Difference]: Finished difference Result 1077 states and 3282 transitions. [2022-01-28 14:49:30,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:49:30,029 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:30,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:30,031 INFO L225 Difference]: With dead ends: 1077 [2022-01-28 14:49:30,031 INFO L226 Difference]: Without dead ends: 957 [2022-01-28 14:49:30,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:49:30,032 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 116 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:30,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 277 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:49:30,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-01-28 14:49:30,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 827. [2022-01-28 14:49:30,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 3.135593220338983) internal successors, (2590), 826 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:30,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2590 transitions. [2022-01-28 14:49:30,045 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2590 transitions. Word has length 24 [2022-01-28 14:49:30,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:30,045 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 2590 transitions. [2022-01-28 14:49:30,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:30,046 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2590 transitions. [2022-01-28 14:49:30,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:30,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:30,047 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:30,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:30,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-28 14:49:30,259 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:30,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:30,259 INFO L85 PathProgramCache]: Analyzing trace with hash 664997007, now seen corresponding path program 32 times [2022-01-28 14:49:30,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:30,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557562259] [2022-01-28 14:49:30,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:30,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:30,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:30,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557562259] [2022-01-28 14:49:30,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557562259] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:30,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752691086] [2022-01-28 14:49:30,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:49:30,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:30,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:30,432 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:30,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-28 14:49:30,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:49:30,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:30,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:49:30,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:30,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:30,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:49:30,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:30,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:30,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:49:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:30,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:31,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:31,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:49:31,458 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:31,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:49:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:31,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752691086] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:31,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:31,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:49:31,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862568633] [2022-01-28 14:49:31,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:31,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:49:31,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:31,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:49:31,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:49:31,464 INFO L87 Difference]: Start difference. First operand 827 states and 2590 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:31,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:31,764 INFO L93 Difference]: Finished difference Result 917 states and 2839 transitions. [2022-01-28 14:49:31,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:49:31,764 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:31,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:31,766 INFO L225 Difference]: With dead ends: 917 [2022-01-28 14:49:31,766 INFO L226 Difference]: Without dead ends: 872 [2022-01-28 14:49:31,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:49:31,767 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 391 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:31,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 190 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 421 Invalid, 0 Unknown, 391 Unchecked, 0.2s Time] [2022-01-28 14:49:31,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-01-28 14:49:31,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 834. [2022-01-28 14:49:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 3.142857142857143) internal successors, (2618), 833 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:31,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 2618 transitions. [2022-01-28 14:49:31,787 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 2618 transitions. Word has length 24 [2022-01-28 14:49:31,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:31,787 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 2618 transitions. [2022-01-28 14:49:31,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:31,787 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 2618 transitions. [2022-01-28 14:49:31,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:31,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:31,788 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:31,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:32,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:32,005 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:32,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:32,006 INFO L85 PathProgramCache]: Analyzing trace with hash -960638089, now seen corresponding path program 33 times [2022-01-28 14:49:32,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:32,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260034164] [2022-01-28 14:49:32,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:32,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:32,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:32,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260034164] [2022-01-28 14:49:32,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260034164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:32,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258264220] [2022-01-28 14:49:32,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:49:32,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:32,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:32,121 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:32,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-28 14:49:32,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:49:32,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:32,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:49:32,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:32,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:32,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:49:32,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:32,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:32,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:49:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:32,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:32,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:32,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:49:32,986 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:32,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:49:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:32,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258264220] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:32,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:32,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:49:32,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257603445] [2022-01-28 14:49:32,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:32,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:49:32,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:32,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:49:32,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:49:32,992 INFO L87 Difference]: Start difference. First operand 834 states and 2618 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:33,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:33,106 INFO L93 Difference]: Finished difference Result 946 states and 2956 transitions. [2022-01-28 14:49:33,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:49:33,106 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:33,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:33,108 INFO L225 Difference]: With dead ends: 946 [2022-01-28 14:49:33,108 INFO L226 Difference]: Without dead ends: 915 [2022-01-28 14:49:33,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:49:33,109 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 69 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:33,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 142 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 226 Invalid, 0 Unknown, 194 Unchecked, 0.1s Time] [2022-01-28 14:49:33,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-01-28 14:49:33,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 848. [2022-01-28 14:49:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.1487603305785123) internal successors, (2667), 847 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:33,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2667 transitions. [2022-01-28 14:49:33,120 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2667 transitions. Word has length 24 [2022-01-28 14:49:33,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:33,120 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 2667 transitions. [2022-01-28 14:49:33,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:33,120 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2667 transitions. [2022-01-28 14:49:33,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:33,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:33,121 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:33,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:33,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-28 14:49:33,347 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:33,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:33,347 INFO L85 PathProgramCache]: Analyzing trace with hash -373722487, now seen corresponding path program 34 times [2022-01-28 14:49:33,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:33,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714461409] [2022-01-28 14:49:33,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:33,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:33,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:33,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714461409] [2022-01-28 14:49:33,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714461409] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:33,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219978232] [2022-01-28 14:49:33,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:49:33,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:33,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:33,479 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:33,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-28 14:49:33,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:49:33,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:33,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:49:33,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:33,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:33,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:49:33,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:33,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:49:33,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-28 14:49:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:33,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:34,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:34,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:49:34,415 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:34,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:49:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:34,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219978232] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:34,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:34,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:49:34,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125702972] [2022-01-28 14:49:34,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:34,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:49:34,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:34,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:49:34,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:49:34,426 INFO L87 Difference]: Start difference. First operand 848 states and 2667 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:34,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:34,553 INFO L93 Difference]: Finished difference Result 979 states and 3060 transitions. [2022-01-28 14:49:34,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:49:34,553 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:34,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:34,555 INFO L225 Difference]: With dead ends: 979 [2022-01-28 14:49:34,555 INFO L226 Difference]: Without dead ends: 948 [2022-01-28 14:49:34,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:49:34,555 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 85 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:34,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 180 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 306 Invalid, 0 Unknown, 381 Unchecked, 0.1s Time] [2022-01-28 14:49:34,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-01-28 14:49:34,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 848. [2022-01-28 14:49:34,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.1487603305785123) internal successors, (2667), 847 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:34,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2667 transitions. [2022-01-28 14:49:34,567 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2667 transitions. Word has length 24 [2022-01-28 14:49:34,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:34,568 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 2667 transitions. [2022-01-28 14:49:34,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:34,568 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2667 transitions. [2022-01-28 14:49:34,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:34,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:34,569 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:34,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:34,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-28 14:49:34,786 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:34,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1542398869, now seen corresponding path program 35 times [2022-01-28 14:49:34,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:34,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259163956] [2022-01-28 14:49:34,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:34,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:35,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:35,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259163956] [2022-01-28 14:49:35,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259163956] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:35,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66155092] [2022-01-28 14:49:35,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:49:35,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:35,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:35,028 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:35,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-28 14:49:35,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:49:35,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:35,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:49:35,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:35,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:35,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:35,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:35,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:49:35,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:49:35,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:49:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:35,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:36,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:36,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 107 [2022-01-28 14:49:36,340 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:36,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:49:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:36,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66155092] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:36,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:36,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:49:36,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382589256] [2022-01-28 14:49:36,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:36,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:49:36,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:36,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:49:36,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:49:36,346 INFO L87 Difference]: Start difference. First operand 848 states and 2667 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:36,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:36,580 INFO L93 Difference]: Finished difference Result 942 states and 2946 transitions. [2022-01-28 14:49:36,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:49:36,581 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:36,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:36,583 INFO L225 Difference]: With dead ends: 942 [2022-01-28 14:49:36,583 INFO L226 Difference]: Without dead ends: 911 [2022-01-28 14:49:36,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:49:36,583 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:36,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 206 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 377 Invalid, 0 Unknown, 286 Unchecked, 0.1s Time] [2022-01-28 14:49:36,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-01-28 14:49:36,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 850. [2022-01-28 14:49:36,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.1519434628975267) internal successors, (2676), 849 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:36,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2676 transitions. [2022-01-28 14:49:36,594 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2676 transitions. Word has length 24 [2022-01-28 14:49:36,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:36,594 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 2676 transitions. [2022-01-28 14:49:36,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:36,594 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2676 transitions. [2022-01-28 14:49:36,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:36,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:36,596 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:36,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:36,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:36,813 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:36,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:36,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1588126163, now seen corresponding path program 36 times [2022-01-28 14:49:36,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:36,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477087340] [2022-01-28 14:49:36,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:36,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:36,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:36,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477087340] [2022-01-28 14:49:36,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477087340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:36,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760902330] [2022-01-28 14:49:36,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:49:36,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:36,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:37,000 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:37,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-28 14:49:37,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:49:37,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:37,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:49:37,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:37,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:37,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:37,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:37,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:49:37,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:49:37,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:49:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:37,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:37,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:37,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 107 [2022-01-28 14:49:38,137 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:38,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:49:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:38,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760902330] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:38,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:38,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:49:38,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226327107] [2022-01-28 14:49:38,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:38,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:49:38,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:38,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:49:38,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:49:38,142 INFO L87 Difference]: Start difference. First operand 850 states and 2676 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:38,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:38,457 INFO L93 Difference]: Finished difference Result 1018 states and 3143 transitions. [2022-01-28 14:49:38,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:49:38,457 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:38,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:38,459 INFO L225 Difference]: With dead ends: 1018 [2022-01-28 14:49:38,459 INFO L226 Difference]: Without dead ends: 952 [2022-01-28 14:49:38,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:49:38,460 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:38,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 223 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 396 Invalid, 0 Unknown, 106 Unchecked, 0.2s Time] [2022-01-28 14:49:38,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-01-28 14:49:38,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 851. [2022-01-28 14:49:38,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.152941176470588) internal successors, (2680), 850 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:38,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2680 transitions. [2022-01-28 14:49:38,471 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2680 transitions. Word has length 24 [2022-01-28 14:49:38,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:38,471 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 2680 transitions. [2022-01-28 14:49:38,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:38,471 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2680 transitions. [2022-01-28 14:49:38,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:38,472 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:38,472 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:38,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:38,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:38,673 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:38,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:38,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1657919583, now seen corresponding path program 37 times [2022-01-28 14:49:38,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:38,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998059527] [2022-01-28 14:49:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:38,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:38,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:38,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998059527] [2022-01-28 14:49:38,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998059527] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:38,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070362362] [2022-01-28 14:49:38,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:49:38,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:38,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:38,876 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:38,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-28 14:49:38,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:38,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:49:38,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:39,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:39,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:39,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:39,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:39,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:49:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:39,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:39,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:39,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2022-01-28 14:49:40,103 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:40,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:49:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:40,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070362362] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:40,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:40,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:49:40,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329165872] [2022-01-28 14:49:40,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:40,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:49:40,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:40,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:49:40,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:49:40,109 INFO L87 Difference]: Start difference. First operand 851 states and 2680 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:40,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:40,709 INFO L93 Difference]: Finished difference Result 1221 states and 3668 transitions. [2022-01-28 14:49:40,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:49:40,709 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:40,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:40,712 INFO L225 Difference]: With dead ends: 1221 [2022-01-28 14:49:40,712 INFO L226 Difference]: Without dead ends: 1072 [2022-01-28 14:49:40,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:49:40,712 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 113 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:40,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 261 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 571 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-01-28 14:49:40,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2022-01-28 14:49:40,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 872. [2022-01-28 14:49:40,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.1733639494833525) internal successors, (2764), 871 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2764 transitions. [2022-01-28 14:49:40,725 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2764 transitions. Word has length 24 [2022-01-28 14:49:40,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:40,725 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 2764 transitions. [2022-01-28 14:49:40,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:40,725 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2764 transitions. [2022-01-28 14:49:40,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:40,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:40,727 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:40,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:40,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:40,943 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:40,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:40,943 INFO L85 PathProgramCache]: Analyzing trace with hash -2098727429, now seen corresponding path program 38 times [2022-01-28 14:49:40,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:40,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116030537] [2022-01-28 14:49:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:40,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:41,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:41,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116030537] [2022-01-28 14:49:41,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116030537] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:41,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856559105] [2022-01-28 14:49:41,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:49:41,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:41,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:41,114 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:41,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-28 14:49:41,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:49:41,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:41,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:49:41,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:41,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:41,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:41,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:49:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:41,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:41,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:41,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2022-01-28 14:49:42,105 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:42,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:49:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:42,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856559105] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:42,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:42,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:49:42,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305529829] [2022-01-28 14:49:42,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:42,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:49:42,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:42,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:49:42,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:49:42,111 INFO L87 Difference]: Start difference. First operand 872 states and 2764 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:43,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:43,183 INFO L93 Difference]: Finished difference Result 1221 states and 3748 transitions. [2022-01-28 14:49:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:49:43,183 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:43,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:43,186 INFO L225 Difference]: With dead ends: 1221 [2022-01-28 14:49:43,186 INFO L226 Difference]: Without dead ends: 1108 [2022-01-28 14:49:43,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:49:43,190 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 159 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:43,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 351 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:49:43,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2022-01-28 14:49:43,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 875. [2022-01-28 14:49:43,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.1727688787185353) internal successors, (2773), 874 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:43,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2773 transitions. [2022-01-28 14:49:43,202 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2773 transitions. Word has length 24 [2022-01-28 14:49:43,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:43,202 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 2773 transitions. [2022-01-28 14:49:43,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:43,203 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2773 transitions. [2022-01-28 14:49:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:43,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:43,204 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:43,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:43,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-01-28 14:49:43,404 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:43,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:43,405 INFO L85 PathProgramCache]: Analyzing trace with hash 604080769, now seen corresponding path program 39 times [2022-01-28 14:49:43,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:43,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229746453] [2022-01-28 14:49:43,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:43,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:43,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:43,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229746453] [2022-01-28 14:49:43,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229746453] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:43,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884462977] [2022-01-28 14:49:43,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:49:43,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:43,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:43,592 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:43,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-28 14:49:43,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:49:43,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:43,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:49:43,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:43,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:43,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:49:43,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:49:43,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:49:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:43,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:44,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:44,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2022-01-28 14:49:44,470 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:44,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:49:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:44,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884462977] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:44,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:44,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:49:44,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684574523] [2022-01-28 14:49:44,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:44,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:49:44,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:44,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:49:44,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:49:44,475 INFO L87 Difference]: Start difference. First operand 875 states and 2773 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:45,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:45,752 INFO L93 Difference]: Finished difference Result 1253 states and 3824 transitions. [2022-01-28 14:49:45,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 14:49:45,752 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:45,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:45,754 INFO L225 Difference]: With dead ends: 1253 [2022-01-28 14:49:45,754 INFO L226 Difference]: Without dead ends: 1136 [2022-01-28 14:49:45,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=278, Invalid=1444, Unknown=0, NotChecked=0, Total=1722 [2022-01-28 14:49:45,755 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 187 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:45,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 309 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:49:45,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-01-28 14:49:45,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 887. [2022-01-28 14:49:45,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.1659142212189617) internal successors, (2805), 886 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2805 transitions. [2022-01-28 14:49:45,767 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2805 transitions. Word has length 24 [2022-01-28 14:49:45,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:45,767 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 2805 transitions. [2022-01-28 14:49:45,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2805 transitions. [2022-01-28 14:49:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:45,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:45,768 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:45,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-28 14:49:45,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-28 14:49:45,969 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:45,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:45,969 INFO L85 PathProgramCache]: Analyzing trace with hash -439998855, now seen corresponding path program 40 times [2022-01-28 14:49:45,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:45,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129081059] [2022-01-28 14:49:45,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:45,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:46,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:46,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129081059] [2022-01-28 14:49:46,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129081059] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:46,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906919108] [2022-01-28 14:49:46,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:49:46,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:46,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:46,163 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:46,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-28 14:49:46,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:49:46,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:46,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:49:46,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:46,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:46,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:46,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:49:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:46,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:46,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:46,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:49:47,134 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:47,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:49:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:47,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906919108] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:47,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:47,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:49:47,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793219688] [2022-01-28 14:49:47,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:47,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:49:47,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:47,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:49:47,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:49:47,139 INFO L87 Difference]: Start difference. First operand 887 states and 2805 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:48,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:48,067 INFO L93 Difference]: Finished difference Result 1175 states and 3634 transitions. [2022-01-28 14:49:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:49:48,067 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:48,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:48,069 INFO L225 Difference]: With dead ends: 1175 [2022-01-28 14:49:48,069 INFO L226 Difference]: Without dead ends: 1117 [2022-01-28 14:49:48,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 14:49:48,070 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 125 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:48,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 339 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:49:48,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-01-28 14:49:48,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 902. [2022-01-28 14:49:48,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.1664816870144286) internal successors, (2853), 901 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:48,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2853 transitions. [2022-01-28 14:49:48,083 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2853 transitions. Word has length 24 [2022-01-28 14:49:48,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:48,083 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 2853 transitions. [2022-01-28 14:49:48,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:48,083 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2853 transitions. [2022-01-28 14:49:48,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:48,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:48,084 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:48,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:48,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-28 14:49:48,295 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:48,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:48,296 INFO L85 PathProgramCache]: Analyzing trace with hash 723934319, now seen corresponding path program 41 times [2022-01-28 14:49:48,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:48,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418060498] [2022-01-28 14:49:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:48,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:48,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:48,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418060498] [2022-01-28 14:49:48,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418060498] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:48,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498562715] [2022-01-28 14:49:48,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:49:48,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:48,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:48,469 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:48,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-28 14:49:48,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:49:48,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:48,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:49:48,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:48,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:48,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:48,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:49:48,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:48,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:49:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:48,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:49,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:49,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2022-01-28 14:49:49,564 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:49,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:49:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:49,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498562715] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:49,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:49,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:49:49,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111597271] [2022-01-28 14:49:49,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:49,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:49:49,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:49,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:49:49,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:49:49,570 INFO L87 Difference]: Start difference. First operand 902 states and 2853 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:50,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:50,437 INFO L93 Difference]: Finished difference Result 1282 states and 3779 transitions. [2022-01-28 14:49:50,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:49:50,438 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:50,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:50,440 INFO L225 Difference]: With dead ends: 1282 [2022-01-28 14:49:50,440 INFO L226 Difference]: Without dead ends: 1171 [2022-01-28 14:49:50,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 14:49:50,441 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 172 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:50,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 356 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 793 Invalid, 0 Unknown, 157 Unchecked, 0.3s Time] [2022-01-28 14:49:50,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-01-28 14:49:50,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 907. [2022-01-28 14:49:50,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 3.165562913907285) internal successors, (2868), 906 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:50,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 2868 transitions. [2022-01-28 14:49:50,454 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 2868 transitions. Word has length 24 [2022-01-28 14:49:50,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:50,454 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 2868 transitions. [2022-01-28 14:49:50,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:50,454 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 2868 transitions. [2022-01-28 14:49:50,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:50,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:50,456 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:50,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:50,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-01-28 14:49:50,656 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:50,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:50,656 INFO L85 PathProgramCache]: Analyzing trace with hash 2093263253, now seen corresponding path program 42 times [2022-01-28 14:49:50,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:50,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671134482] [2022-01-28 14:49:50,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:50,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:50,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:50,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671134482] [2022-01-28 14:49:50,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671134482] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:50,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918403043] [2022-01-28 14:49:50,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:49:50,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:50,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:50,841 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:50,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-28 14:49:50,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:49:50,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:50,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:49:50,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:51,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:51,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:51,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:51,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:51,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:49:51,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:51,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:51,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:51,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2022-01-28 14:49:51,875 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:51,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:49:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:51,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918403043] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:51,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:51,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:49:51,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183856196] [2022-01-28 14:49:51,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:51,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:49:51,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:51,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:49:51,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:49:51,881 INFO L87 Difference]: Start difference. First operand 907 states and 2868 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:52,102 INFO L93 Difference]: Finished difference Result 1062 states and 3298 transitions. [2022-01-28 14:49:52,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:49:52,102 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:52,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:52,105 INFO L225 Difference]: With dead ends: 1062 [2022-01-28 14:49:52,105 INFO L226 Difference]: Without dead ends: 1015 [2022-01-28 14:49:52,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:49:52,105 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:52,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 219 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 272 Invalid, 0 Unknown, 231 Unchecked, 0.1s Time] [2022-01-28 14:49:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-01-28 14:49:52,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 919. [2022-01-28 14:49:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 3.1633986928104574) internal successors, (2904), 918 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2904 transitions. [2022-01-28 14:49:52,117 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2904 transitions. Word has length 24 [2022-01-28 14:49:52,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:52,117 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 2904 transitions. [2022-01-28 14:49:52,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:52,117 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2904 transitions. [2022-01-28 14:49:52,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:52,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:52,118 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:52,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:52,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:52,319 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:52,319 INFO L85 PathProgramCache]: Analyzing trace with hash -350679239, now seen corresponding path program 43 times [2022-01-28 14:49:52,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:52,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206127560] [2022-01-28 14:49:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:52,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:52,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:52,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206127560] [2022-01-28 14:49:52,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206127560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:52,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668105914] [2022-01-28 14:49:52,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:49:52,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:52,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:52,517 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:52,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-28 14:49:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:52,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:49:52,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:52,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:52,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:52,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:52,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:52,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:49:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:53,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:53,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:53,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:49:53,820 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:53,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:49:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:53,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668105914] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:53,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:53,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:49:53,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773677358] [2022-01-28 14:49:53,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:53,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:49:53,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:53,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:49:53,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:49:53,826 INFO L87 Difference]: Start difference. First operand 919 states and 2904 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:53,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:53,998 INFO L93 Difference]: Finished difference Result 1018 states and 3195 transitions. [2022-01-28 14:49:53,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:49:53,998 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:53,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:54,000 INFO L225 Difference]: With dead ends: 1018 [2022-01-28 14:49:54,000 INFO L226 Difference]: Without dead ends: 987 [2022-01-28 14:49:54,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:49:54,000 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:54,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 186 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 388 Invalid, 0 Unknown, 146 Unchecked, 0.1s Time] [2022-01-28 14:49:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-01-28 14:49:54,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 919. [2022-01-28 14:49:54,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 3.1633986928104574) internal successors, (2904), 918 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:54,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2904 transitions. [2022-01-28 14:49:54,011 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2904 transitions. Word has length 24 [2022-01-28 14:49:54,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:54,011 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 2904 transitions. [2022-01-28 14:49:54,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:54,011 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2904 transitions. [2022-01-28 14:49:54,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:54,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:54,013 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:54,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-28 14:49:54,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-28 14:49:54,216 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:54,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:54,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1007607403, now seen corresponding path program 44 times [2022-01-28 14:49:54,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:54,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925118515] [2022-01-28 14:49:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:54,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:54,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:54,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925118515] [2022-01-28 14:49:54,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925118515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:54,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756420402] [2022-01-28 14:49:54,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:49:54,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:54,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:54,435 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:54,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-28 14:49:54,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:49:54,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:54,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:49:54,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:54,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:54,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:54,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:54,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:49:54,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:49:54,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:49:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:54,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:55,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:55,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2022-01-28 14:49:55,681 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:55,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:49:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:55,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756420402] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:55,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:55,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:49:55,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056590496] [2022-01-28 14:49:55,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:55,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:49:55,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:55,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:49:55,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:49:55,686 INFO L87 Difference]: Start difference. First operand 919 states and 2904 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:57,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:57,506 INFO L93 Difference]: Finished difference Result 1746 states and 4992 transitions. [2022-01-28 14:49:57,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-28 14:49:57,506 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:49:57,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:57,510 INFO L225 Difference]: With dead ends: 1746 [2022-01-28 14:49:57,510 INFO L226 Difference]: Without dead ends: 1573 [2022-01-28 14:49:57,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=324, Invalid=1746, Unknown=0, NotChecked=0, Total=2070 [2022-01-28 14:49:57,510 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 303 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 406 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:57,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 376 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 880 Invalid, 0 Unknown, 406 Unchecked, 0.4s Time] [2022-01-28 14:49:57,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2022-01-28 14:49:57,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 935. [2022-01-28 14:49:57,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 3.1830835117773018) internal successors, (2973), 934 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2973 transitions. [2022-01-28 14:49:57,526 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2973 transitions. Word has length 24 [2022-01-28 14:49:57,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:57,526 INFO L470 AbstractCegarLoop]: Abstraction has 935 states and 2973 transitions. [2022-01-28 14:49:57,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:57,526 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2973 transitions. [2022-01-28 14:49:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:49:57,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:57,528 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:57,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-28 14:49:57,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-28 14:49:57,731 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:57,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:57,732 INFO L85 PathProgramCache]: Analyzing trace with hash 434682639, now seen corresponding path program 45 times [2022-01-28 14:49:57,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:57,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365529311] [2022-01-28 14:49:57,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:57,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:57,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:57,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365529311] [2022-01-28 14:49:57,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365529311] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:57,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357466842] [2022-01-28 14:49:57,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:49:57,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:57,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:57,954 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:49:57,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-28 14:49:57,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:49:57,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:57,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:49:57,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:58,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:58,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:49:58,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:49:58,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:58,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:49:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:58,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:58,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:58,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2022-01-28 14:49:59,174 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:49:59,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:49:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:49:59,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357466842] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:59,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:59,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:49:59,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088099806] [2022-01-28 14:49:59,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:59,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:49:59,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:59,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:49:59,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:49:59,180 INFO L87 Difference]: Start difference. First operand 935 states and 2973 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:00,167 INFO L93 Difference]: Finished difference Result 1732 states and 5116 transitions. [2022-01-28 14:50:00,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 14:50:00,168 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:00,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:00,170 INFO L225 Difference]: With dead ends: 1732 [2022-01-28 14:50:00,170 INFO L226 Difference]: Without dead ends: 1567 [2022-01-28 14:50:00,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:50:00,171 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 194 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:00,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 358 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 778 Invalid, 0 Unknown, 106 Unchecked, 0.4s Time] [2022-01-28 14:50:00,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2022-01-28 14:50:00,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 946. [2022-01-28 14:50:00,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 3.2063492063492065) internal successors, (3030), 945 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 3030 transitions. [2022-01-28 14:50:00,186 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 3030 transitions. Word has length 24 [2022-01-28 14:50:00,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:00,186 INFO L470 AbstractCegarLoop]: Abstraction has 946 states and 3030 transitions. [2022-01-28 14:50:00,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:00,186 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 3030 transitions. [2022-01-28 14:50:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:00,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:00,187 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:00,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-28 14:50:00,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-01-28 14:50:00,388 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:00,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:00,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1796429725, now seen corresponding path program 46 times [2022-01-28 14:50:00,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:00,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190757358] [2022-01-28 14:50:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:00,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:00,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:00,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190757358] [2022-01-28 14:50:00,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190757358] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:00,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876095180] [2022-01-28 14:50:00,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:50:00,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:00,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:00,552 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:00,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-28 14:50:00,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:50:00,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:00,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:50:00,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:00,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:50:00,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:50:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:00,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:01,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:01,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:50:01,540 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:01,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:50:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:01,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876095180] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:01,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:01,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:50:01,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509280148] [2022-01-28 14:50:01,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:01,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:50:01,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:01,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:50:01,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:50:01,544 INFO L87 Difference]: Start difference. First operand 946 states and 3030 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:02,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:02,109 INFO L93 Difference]: Finished difference Result 1209 states and 3772 transitions. [2022-01-28 14:50:02,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:50:02,109 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:02,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:02,112 INFO L225 Difference]: With dead ends: 1209 [2022-01-28 14:50:02,112 INFO L226 Difference]: Without dead ends: 1095 [2022-01-28 14:50:02,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:50:02,112 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 132 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:02,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 209 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:50:02,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2022-01-28 14:50:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 960. [2022-01-28 14:50:02,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.2033368091762253) internal successors, (3072), 959 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:02,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3072 transitions. [2022-01-28 14:50:02,125 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3072 transitions. Word has length 24 [2022-01-28 14:50:02,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:02,125 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 3072 transitions. [2022-01-28 14:50:02,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:02,125 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3072 transitions. [2022-01-28 14:50:02,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:02,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:02,126 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:02,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:02,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:02,343 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:02,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:02,343 INFO L85 PathProgramCache]: Analyzing trace with hash 54595079, now seen corresponding path program 47 times [2022-01-28 14:50:02,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:02,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796093058] [2022-01-28 14:50:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:02,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:02,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:02,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796093058] [2022-01-28 14:50:02,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796093058] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:02,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117722218] [2022-01-28 14:50:02,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:50:02,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:02,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:02,511 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:02,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-28 14:50:02,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:50:02,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:02,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:50:02,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:02,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:02,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:50:02,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:02,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:02,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:50:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:02,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:03,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:03,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:50:03,747 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:03,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:50:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:03,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117722218] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:03,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:03,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:50:03,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056451140] [2022-01-28 14:50:03,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:03,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:50:03,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:03,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:50:03,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:50:03,754 INFO L87 Difference]: Start difference. First operand 960 states and 3072 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:03,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:03,953 INFO L93 Difference]: Finished difference Result 1063 states and 3375 transitions. [2022-01-28 14:50:03,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:50:03,954 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:03,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:03,956 INFO L225 Difference]: With dead ends: 1063 [2022-01-28 14:50:03,956 INFO L226 Difference]: Without dead ends: 1032 [2022-01-28 14:50:03,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:50:03,956 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 95 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:03,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 190 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 429 Invalid, 0 Unknown, 352 Unchecked, 0.2s Time] [2022-01-28 14:50:03,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-01-28 14:50:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 966. [2022-01-28 14:50:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 3.2020725388601035) internal successors, (3090), 965 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:03,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 3090 transitions. [2022-01-28 14:50:03,968 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 3090 transitions. Word has length 24 [2022-01-28 14:50:03,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:03,968 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 3090 transitions. [2022-01-28 14:50:03,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:03,968 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 3090 transitions. [2022-01-28 14:50:03,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:03,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:03,970 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:03,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-28 14:50:04,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:04,179 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:04,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:04,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1571040017, now seen corresponding path program 48 times [2022-01-28 14:50:04,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:04,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890479636] [2022-01-28 14:50:04,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:04,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:04,317 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:04,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:04,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890479636] [2022-01-28 14:50:04,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890479636] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:04,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130871036] [2022-01-28 14:50:04,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:50:04,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:04,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:04,319 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:04,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-28 14:50:04,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:50:04,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:04,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:50:04,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:04,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:50:04,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:04,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:50:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:04,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:04,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:04,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:50:05,056 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:05,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-28 14:50:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:05,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130871036] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:05,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:05,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:50:05,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7160508] [2022-01-28 14:50:05,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:05,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:05,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:05,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:05,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:05,061 INFO L87 Difference]: Start difference. First operand 966 states and 3090 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:05,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:05,482 INFO L93 Difference]: Finished difference Result 1151 states and 3634 transitions. [2022-01-28 14:50:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:50:05,483 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:05,485 INFO L225 Difference]: With dead ends: 1151 [2022-01-28 14:50:05,485 INFO L226 Difference]: Without dead ends: 1120 [2022-01-28 14:50:05,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:50:05,485 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 105 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:05,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 255 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:50:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-01-28 14:50:05,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 960. [2022-01-28 14:50:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.2033368091762253) internal successors, (3072), 959 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:05,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3072 transitions. [2022-01-28 14:50:05,498 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3072 transitions. Word has length 24 [2022-01-28 14:50:05,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:05,498 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 3072 transitions. [2022-01-28 14:50:05,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:05,498 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3072 transitions. [2022-01-28 14:50:05,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:05,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:05,500 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:05,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-28 14:50:05,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:05,700 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:05,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:05,701 INFO L85 PathProgramCache]: Analyzing trace with hash 2142166499, now seen corresponding path program 49 times [2022-01-28 14:50:05,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:05,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631697622] [2022-01-28 14:50:05,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:05,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:05,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:05,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631697622] [2022-01-28 14:50:05,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631697622] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:05,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422593465] [2022-01-28 14:50:05,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:50:05,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:05,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:05,884 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:05,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-28 14:50:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:05,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:50:05,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:06,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:06,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:50:06,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:06,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:50:06,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:50:06,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:50:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:06,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:06,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:06,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2022-01-28 14:50:07,106 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:07,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:50:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:07,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422593465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:07,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:07,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:50:07,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669952019] [2022-01-28 14:50:07,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:07,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:50:07,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:07,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:50:07,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:50:07,112 INFO L87 Difference]: Start difference. First operand 960 states and 3072 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:08,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:08,386 INFO L93 Difference]: Finished difference Result 1721 states and 5067 transitions. [2022-01-28 14:50:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-28 14:50:08,387 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:08,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:08,390 INFO L225 Difference]: With dead ends: 1721 [2022-01-28 14:50:08,390 INFO L226 Difference]: Without dead ends: 1548 [2022-01-28 14:50:08,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2022-01-28 14:50:08,390 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 254 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:08,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 405 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 977 Invalid, 0 Unknown, 262 Unchecked, 0.4s Time] [2022-01-28 14:50:08,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548 states. [2022-01-28 14:50:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548 to 967. [2022-01-28 14:50:08,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 3.2163561076604554) internal successors, (3107), 966 states have internal predecessors, (3107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3107 transitions. [2022-01-28 14:50:08,406 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3107 transitions. Word has length 24 [2022-01-28 14:50:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:08,406 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 3107 transitions. [2022-01-28 14:50:08,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:08,406 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3107 transitions. [2022-01-28 14:50:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:08,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:08,408 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:08,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:08,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-28 14:50:08,623 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:08,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:08,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1569241735, now seen corresponding path program 50 times [2022-01-28 14:50:08,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:08,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968171194] [2022-01-28 14:50:08,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:08,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:08,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:08,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968171194] [2022-01-28 14:50:08,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968171194] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:08,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496019377] [2022-01-28 14:50:08,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:50:08,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:08,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:08,846 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:08,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-28 14:50:08,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:50:08,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:08,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:50:08,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:09,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:09,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:50:09,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:09,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:50:09,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:50:09,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:50:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:09,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:09,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:09,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2022-01-28 14:50:10,003 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:10,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:50:10,008 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:10,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496019377] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:10,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:10,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:50:10,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805823528] [2022-01-28 14:50:10,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:10,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:50:10,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:10,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:50:10,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:50:10,009 INFO L87 Difference]: Start difference. First operand 967 states and 3107 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:11,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:11,258 INFO L93 Difference]: Finished difference Result 1818 states and 5318 transitions. [2022-01-28 14:50:11,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:50:11,259 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:11,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:11,278 INFO L225 Difference]: With dead ends: 1818 [2022-01-28 14:50:11,278 INFO L226 Difference]: Without dead ends: 1626 [2022-01-28 14:50:11,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 14:50:11,279 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 181 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:11,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 446 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1052 Invalid, 0 Unknown, 30 Unchecked, 0.4s Time] [2022-01-28 14:50:11,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2022-01-28 14:50:11,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 975. [2022-01-28 14:50:11,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 3.2248459958932236) internal successors, (3141), 974 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:11,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 3141 transitions. [2022-01-28 14:50:11,297 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 3141 transitions. Word has length 24 [2022-01-28 14:50:11,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:11,297 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 3141 transitions. [2022-01-28 14:50:11,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:11,297 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 3141 transitions. [2022-01-28 14:50:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:11,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:11,299 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:11,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:11,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-01-28 14:50:11,516 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:11,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:11,516 INFO L85 PathProgramCache]: Analyzing trace with hash 2026645785, now seen corresponding path program 51 times [2022-01-28 14:50:11,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:11,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073848473] [2022-01-28 14:50:11,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:11,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:11,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:11,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073848473] [2022-01-28 14:50:11,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073848473] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:11,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991551556] [2022-01-28 14:50:11,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:50:11,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:11,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:11,735 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:11,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-28 14:50:11,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:50:11,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:11,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:50:11,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:11,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:11,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:50:11,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:11,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:12,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:50:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:12,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:12,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:12,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:50:12,742 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:12,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:50:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:12,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991551556] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:12,747 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:12,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:50:12,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229841866] [2022-01-28 14:50:12,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:12,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:50:12,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:12,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:50:12,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:50:12,748 INFO L87 Difference]: Start difference. First operand 975 states and 3141 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:13,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:13,029 INFO L93 Difference]: Finished difference Result 1080 states and 3458 transitions. [2022-01-28 14:50:13,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:50:13,029 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:13,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:13,032 INFO L225 Difference]: With dead ends: 1080 [2022-01-28 14:50:13,032 INFO L226 Difference]: Without dead ends: 1049 [2022-01-28 14:50:13,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:50:13,032 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:13,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 212 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 541 Invalid, 0 Unknown, 112 Unchecked, 0.2s Time] [2022-01-28 14:50:13,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2022-01-28 14:50:13,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 982. [2022-01-28 14:50:13,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 3.2303771661569827) internal successors, (3169), 981 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 3169 transitions. [2022-01-28 14:50:13,045 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 3169 transitions. Word has length 24 [2022-01-28 14:50:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:13,046 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 3169 transitions. [2022-01-28 14:50:13,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:13,046 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 3169 transitions. [2022-01-28 14:50:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:13,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:13,047 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:13,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:13,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-28 14:50:13,264 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:13,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:13,264 INFO L85 PathProgramCache]: Analyzing trace with hash 478081611, now seen corresponding path program 52 times [2022-01-28 14:50:13,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:13,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565598899] [2022-01-28 14:50:13,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:13,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:13,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:13,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565598899] [2022-01-28 14:50:13,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565598899] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:13,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552882595] [2022-01-28 14:50:13,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:50:13,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:13,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:13,443 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:13,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-28 14:50:13,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:50:13,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:13,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:50:13,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:13,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:13,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:50:13,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:13,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:50:13,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-28 14:50:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:13,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:14,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:14,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:50:14,646 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:14,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:50:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:14,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552882595] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:14,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:14,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:50:14,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582449204] [2022-01-28 14:50:14,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:14,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:50:14,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:14,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:50:14,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:50:14,652 INFO L87 Difference]: Start difference. First operand 982 states and 3169 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:14,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:14,888 INFO L93 Difference]: Finished difference Result 1116 states and 3559 transitions. [2022-01-28 14:50:14,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:50:14,889 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:14,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:14,891 INFO L225 Difference]: With dead ends: 1116 [2022-01-28 14:50:14,891 INFO L226 Difference]: Without dead ends: 1070 [2022-01-28 14:50:14,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:50:14,891 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 439 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:14,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 263 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 490 Invalid, 0 Unknown, 439 Unchecked, 0.2s Time] [2022-01-28 14:50:14,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-01-28 14:50:14,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 1004. [2022-01-28 14:50:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 3.213359920239282) internal successors, (3223), 1003 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 3223 transitions. [2022-01-28 14:50:14,905 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 3223 transitions. Word has length 24 [2022-01-28 14:50:14,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:14,905 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 3223 transitions. [2022-01-28 14:50:14,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:14,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 3223 transitions. [2022-01-28 14:50:14,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:14,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:14,906 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:14,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-01-28 14:50:15,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-28 14:50:15,116 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:15,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:15,116 INFO L85 PathProgramCache]: Analyzing trace with hash -197300317, now seen corresponding path program 53 times [2022-01-28 14:50:15,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:15,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536646695] [2022-01-28 14:50:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:15,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:15,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:15,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536646695] [2022-01-28 14:50:15,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536646695] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:15,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176213482] [2022-01-28 14:50:15,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:50:15,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:15,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:15,307 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:15,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-28 14:50:15,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:50:15,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:15,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:50:15,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:15,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:15,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:50:15,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:15,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:15,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:50:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:15,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:16,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:16,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2022-01-28 14:50:16,314 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:16,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:50:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:16,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176213482] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:16,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:16,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:50:16,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152558375] [2022-01-28 14:50:16,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:16,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:50:16,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:16,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:50:16,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:50:16,319 INFO L87 Difference]: Start difference. First operand 1004 states and 3223 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:16,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:16,598 INFO L93 Difference]: Finished difference Result 1149 states and 3629 transitions. [2022-01-28 14:50:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:50:16,599 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:16,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:16,600 INFO L225 Difference]: With dead ends: 1149 [2022-01-28 14:50:16,600 INFO L226 Difference]: Without dead ends: 1082 [2022-01-28 14:50:16,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:50:16,601 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 68 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:16,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 230 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 447 Invalid, 0 Unknown, 431 Unchecked, 0.2s Time] [2022-01-28 14:50:16,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2022-01-28 14:50:16,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1014. [2022-01-28 14:50:16,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 3.20533070088845) internal successors, (3247), 1013 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 3247 transitions. [2022-01-28 14:50:16,616 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 3247 transitions. Word has length 24 [2022-01-28 14:50:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:16,616 INFO L470 AbstractCegarLoop]: Abstraction has 1014 states and 3247 transitions. [2022-01-28 14:50:16,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:16,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 3247 transitions. [2022-01-28 14:50:16,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:16,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:16,618 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:16,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-28 14:50:16,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-28 14:50:16,828 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:16,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:16,828 INFO L85 PathProgramCache]: Analyzing trace with hash -6321159, now seen corresponding path program 54 times [2022-01-28 14:50:16,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:16,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730840387] [2022-01-28 14:50:16,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:16,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:17,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:17,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730840387] [2022-01-28 14:50:17,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730840387] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:17,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830997223] [2022-01-28 14:50:17,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:50:17,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:17,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:17,026 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:17,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-28 14:50:17,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:50:17,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:17,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:50:17,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:17,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:50:17,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:50:17,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:50:17,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:50:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:17,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:17,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:17,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:50:17,978 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:17,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:50:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:17,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830997223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:17,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:17,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:50:17,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756122964] [2022-01-28 14:50:17,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:17,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:50:17,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:17,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:50:17,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:50:17,983 INFO L87 Difference]: Start difference. First operand 1014 states and 3247 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:20,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:20,102 INFO L93 Difference]: Finished difference Result 1659 states and 4928 transitions. [2022-01-28 14:50:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-28 14:50:20,103 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:20,105 INFO L225 Difference]: With dead ends: 1659 [2022-01-28 14:50:20,105 INFO L226 Difference]: Without dead ends: 1456 [2022-01-28 14:50:20,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=435, Invalid=2427, Unknown=0, NotChecked=0, Total=2862 [2022-01-28 14:50:20,106 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 221 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:20,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 456 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:50:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2022-01-28 14:50:20,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1035. [2022-01-28 14:50:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 3.211798839458414) internal successors, (3321), 1034 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:20,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 3321 transitions. [2022-01-28 14:50:20,121 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 3321 transitions. Word has length 24 [2022-01-28 14:50:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:20,121 INFO L470 AbstractCegarLoop]: Abstraction has 1035 states and 3321 transitions. [2022-01-28 14:50:20,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:20,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 3321 transitions. [2022-01-28 14:50:20,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:20,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:20,123 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:20,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-28 14:50:20,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-28 14:50:20,327 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:20,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:20,328 INFO L85 PathProgramCache]: Analyzing trace with hash 534669689, now seen corresponding path program 55 times [2022-01-28 14:50:20,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:20,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547800863] [2022-01-28 14:50:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:20,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:50:20,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:20,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547800863] [2022-01-28 14:50:20,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547800863] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:20,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349989484] [2022-01-28 14:50:20,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:50:20,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:20,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:20,518 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:20,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-28 14:50:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:20,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:50:20,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:20,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:20,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:50:20,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:20,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:20,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:50:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:50:20,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:21,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:21,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:50:21,549 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:21,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:50:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:50:21,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349989484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:21,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:21,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:50:21,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811445722] [2022-01-28 14:50:21,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:21,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:50:21,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:21,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:50:21,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:50:21,554 INFO L87 Difference]: Start difference. First operand 1035 states and 3321 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:21,765 INFO L93 Difference]: Finished difference Result 1146 states and 3601 transitions. [2022-01-28 14:50:21,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:50:21,766 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:21,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:21,767 INFO L225 Difference]: With dead ends: 1146 [2022-01-28 14:50:21,767 INFO L226 Difference]: Without dead ends: 1103 [2022-01-28 14:50:21,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:50:21,768 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:21,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 265 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 416 Invalid, 0 Unknown, 176 Unchecked, 0.2s Time] [2022-01-28 14:50:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2022-01-28 14:50:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1049. [2022-01-28 14:50:21,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 3.1927480916030535) internal successors, (3346), 1048 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:21,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3346 transitions. [2022-01-28 14:50:21,780 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3346 transitions. Word has length 24 [2022-01-28 14:50:21,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:21,780 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 3346 transitions. [2022-01-28 14:50:21,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:21,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3346 transitions. [2022-01-28 14:50:21,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:21,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:21,781 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:21,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:21,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:21,983 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:21,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:21,983 INFO L85 PathProgramCache]: Analyzing trace with hash 354062651, now seen corresponding path program 56 times [2022-01-28 14:50:21,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:21,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740294404] [2022-01-28 14:50:21,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:21,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:22,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:22,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740294404] [2022-01-28 14:50:22,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740294404] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:22,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831841263] [2022-01-28 14:50:22,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:50:22,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:22,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:22,149 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:22,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-28 14:50:22,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:50:22,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:22,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:50:22,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:22,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:50:22,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:22,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:50:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:22,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:22,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:22,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:50:23,112 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:23,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:50:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:23,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831841263] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:23,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:23,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:50:23,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488795949] [2022-01-28 14:50:23,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:23,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:50:23,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:23,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:50:23,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:50:23,117 INFO L87 Difference]: Start difference. First operand 1049 states and 3346 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:24,296 INFO L93 Difference]: Finished difference Result 1377 states and 4216 transitions. [2022-01-28 14:50:24,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:50:24,296 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:24,299 INFO L225 Difference]: With dead ends: 1377 [2022-01-28 14:50:24,299 INFO L226 Difference]: Without dead ends: 1267 [2022-01-28 14:50:24,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=246, Invalid=1394, Unknown=0, NotChecked=0, Total=1640 [2022-01-28 14:50:24,299 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 144 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:24,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 373 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:50:24,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-01-28 14:50:24,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1039. [2022-01-28 14:50:24,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 3.2090558766859343) internal successors, (3331), 1038 states have internal predecessors, (3331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 3331 transitions. [2022-01-28 14:50:24,312 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 3331 transitions. Word has length 24 [2022-01-28 14:50:24,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:24,313 INFO L470 AbstractCegarLoop]: Abstraction has 1039 states and 3331 transitions. [2022-01-28 14:50:24,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:24,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 3331 transitions. [2022-01-28 14:50:24,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:24,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:24,314 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:24,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-01-28 14:50:24,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:24,515 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:24,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:24,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1771342737, now seen corresponding path program 57 times [2022-01-28 14:50:24,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:24,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803713379] [2022-01-28 14:50:24,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:24,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:24,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:24,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803713379] [2022-01-28 14:50:24,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803713379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:24,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830749907] [2022-01-28 14:50:24,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:50:24,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:24,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:24,656 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:24,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-28 14:50:24,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:50:24,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:24,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:50:24,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:24,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:50:24,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:50:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:24,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:25,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:25,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:50:25,566 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:25,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:50:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:25,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830749907] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:25,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:25,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:50:25,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506324834] [2022-01-28 14:50:25,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:25,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:25,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:25,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:25,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:25,570 INFO L87 Difference]: Start difference. First operand 1039 states and 3331 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:25,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:25,980 INFO L93 Difference]: Finished difference Result 1311 states and 4133 transitions. [2022-01-28 14:50:25,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:50:25,980 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:25,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:25,983 INFO L225 Difference]: With dead ends: 1311 [2022-01-28 14:50:25,983 INFO L226 Difference]: Without dead ends: 1280 [2022-01-28 14:50:25,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:50:25,983 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 111 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:25,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 206 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:50:25,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2022-01-28 14:50:25,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1047. [2022-01-28 14:50:25,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.204588910133843) internal successors, (3352), 1046 states have internal predecessors, (3352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:25,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3352 transitions. [2022-01-28 14:50:25,997 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3352 transitions. Word has length 24 [2022-01-28 14:50:25,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:25,997 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3352 transitions. [2022-01-28 14:50:25,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3352 transitions. [2022-01-28 14:50:25,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:25,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:25,999 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:26,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-28 14:50:26,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:26,200 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:26,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:26,200 INFO L85 PathProgramCache]: Analyzing trace with hash -672599755, now seen corresponding path program 58 times [2022-01-28 14:50:26,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:26,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642201108] [2022-01-28 14:50:26,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:26,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:26,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:26,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642201108] [2022-01-28 14:50:26,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642201108] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:26,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728448105] [2022-01-28 14:50:26,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:50:26,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:26,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:26,345 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:26,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-28 14:50:26,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:50:26,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:26,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:50:26,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:26,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:50:26,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:50:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:26,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:27,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:27,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:50:27,474 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:27,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:50:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:27,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728448105] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:27,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:27,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:50:27,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786611965] [2022-01-28 14:50:27,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:27,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:50:27,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:27,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:50:27,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:50:27,480 INFO L87 Difference]: Start difference. First operand 1047 states and 3352 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:28,294 INFO L93 Difference]: Finished difference Result 1479 states and 4719 transitions. [2022-01-28 14:50:28,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:50:28,295 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:28,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:28,297 INFO L225 Difference]: With dead ends: 1479 [2022-01-28 14:50:28,297 INFO L226 Difference]: Without dead ends: 1403 [2022-01-28 14:50:28,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:50:28,297 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 111 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:28,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 339 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 860 Invalid, 0 Unknown, 316 Unchecked, 0.4s Time] [2022-01-28 14:50:28,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2022-01-28 14:50:28,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1074. [2022-01-28 14:50:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.2246039142590868) internal successors, (3460), 1073 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3460 transitions. [2022-01-28 14:50:28,312 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3460 transitions. Word has length 24 [2022-01-28 14:50:28,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:28,312 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 3460 transitions. [2022-01-28 14:50:28,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:28,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3460 transitions. [2022-01-28 14:50:28,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:28,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:28,313 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:28,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:28,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-01-28 14:50:28,529 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:28,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:28,529 INFO L85 PathProgramCache]: Analyzing trace with hash -657138959, now seen corresponding path program 59 times [2022-01-28 14:50:28,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:28,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290519970] [2022-01-28 14:50:28,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:28,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:28,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:28,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290519970] [2022-01-28 14:50:28,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290519970] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:28,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138513412] [2022-01-28 14:50:28,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:50:28,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:28,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:28,677 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:28,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-28 14:50:28,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:50:28,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:28,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:50:28,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:28,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:50:28,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:50:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:29,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:29,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:29,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 107 [2022-01-28 14:50:29,808 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:29,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:50:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:29,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138513412] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:29,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:29,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:50:29,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311001915] [2022-01-28 14:50:29,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:29,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:29,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:29,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:29,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:29,814 INFO L87 Difference]: Start difference. First operand 1074 states and 3460 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:30,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:30,127 INFO L93 Difference]: Finished difference Result 1428 states and 4484 transitions. [2022-01-28 14:50:30,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:50:30,128 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:30,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:30,130 INFO L225 Difference]: With dead ends: 1428 [2022-01-28 14:50:30,130 INFO L226 Difference]: Without dead ends: 1397 [2022-01-28 14:50:30,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:50:30,130 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 110 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:30,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 228 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 604 Invalid, 0 Unknown, 225 Unchecked, 0.2s Time] [2022-01-28 14:50:30,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2022-01-28 14:50:30,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1074. [2022-01-28 14:50:30,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.2246039142590868) internal successors, (3460), 1073 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:30,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3460 transitions. [2022-01-28 14:50:30,144 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3460 transitions. Word has length 24 [2022-01-28 14:50:30,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:30,144 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 3460 transitions. [2022-01-28 14:50:30,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:30,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3460 transitions. [2022-01-28 14:50:30,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:30,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:30,146 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:30,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-01-28 14:50:30,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-01-28 14:50:30,347 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:30,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:30,347 INFO L85 PathProgramCache]: Analyzing trace with hash 570166173, now seen corresponding path program 60 times [2022-01-28 14:50:30,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:30,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440866899] [2022-01-28 14:50:30,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:30,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:30,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:30,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440866899] [2022-01-28 14:50:30,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440866899] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:30,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520805101] [2022-01-28 14:50:30,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:50:30,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:30,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:30,520 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:30,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-28 14:50:30,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:50:30,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:30,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:50:30,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:30,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:50:30,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:50:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:30,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:31,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:31,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 107 [2022-01-28 14:50:31,568 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:31,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:50:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:31,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520805101] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:31,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:31,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-01-28 14:50:31,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262601058] [2022-01-28 14:50:31,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:31,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:50:31,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:31,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:50:31,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:50:31,572 INFO L87 Difference]: Start difference. First operand 1074 states and 3460 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:32,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:32,021 INFO L93 Difference]: Finished difference Result 1366 states and 4287 transitions. [2022-01-28 14:50:32,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:50:32,022 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:32,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:32,024 INFO L225 Difference]: With dead ends: 1366 [2022-01-28 14:50:32,024 INFO L226 Difference]: Without dead ends: 1316 [2022-01-28 14:50:32,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:50:32,024 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 138 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:32,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 247 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:50:32,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2022-01-28 14:50:32,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1066. [2022-01-28 14:50:32,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1065 states have (on average 3.2178403755868543) internal successors, (3427), 1065 states have internal predecessors, (3427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:32,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 3427 transitions. [2022-01-28 14:50:32,038 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 3427 transitions. Word has length 24 [2022-01-28 14:50:32,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:32,038 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 3427 transitions. [2022-01-28 14:50:32,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:32,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 3427 transitions. [2022-01-28 14:50:32,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:32,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:32,040 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:32,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-28 14:50:32,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:32,240 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:32,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:32,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1946331129, now seen corresponding path program 61 times [2022-01-28 14:50:32,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:32,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163046088] [2022-01-28 14:50:32,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:32,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:32,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:32,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163046088] [2022-01-28 14:50:32,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163046088] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:32,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581683229] [2022-01-28 14:50:32,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:50:32,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:32,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:32,373 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:32,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-28 14:50:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:32,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:50:32,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:32,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:50:32,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:32,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:50:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:32,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:33,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:33,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2022-01-28 14:50:33,228 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:33,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-28 14:50:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:33,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581683229] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:33,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:33,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:50:33,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101006439] [2022-01-28 14:50:33,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:33,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:33,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:33,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:33,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:33,233 INFO L87 Difference]: Start difference. First operand 1066 states and 3427 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:33,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:33,714 INFO L93 Difference]: Finished difference Result 1559 states and 4893 transitions. [2022-01-28 14:50:33,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:50:33,714 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:33,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:33,717 INFO L225 Difference]: With dead ends: 1559 [2022-01-28 14:50:33,717 INFO L226 Difference]: Without dead ends: 1514 [2022-01-28 14:50:33,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:50:33,717 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 145 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:33,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 257 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:50:33,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2022-01-28 14:50:33,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1086. [2022-01-28 14:50:33,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 3.232258064516129) internal successors, (3507), 1085 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:33,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 3507 transitions. [2022-01-28 14:50:33,732 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 3507 transitions. Word has length 24 [2022-01-28 14:50:33,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:33,732 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 3507 transitions. [2022-01-28 14:50:33,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:33,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 3507 transitions. [2022-01-28 14:50:33,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:33,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:33,734 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:33,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-28 14:50:33,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:33,934 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:33,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:33,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1747003993, now seen corresponding path program 62 times [2022-01-28 14:50:33,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:33,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515782817] [2022-01-28 14:50:33,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:33,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:34,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:34,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515782817] [2022-01-28 14:50:34,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515782817] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:34,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634041453] [2022-01-28 14:50:34,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:50:34,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:34,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:34,132 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:34,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-28 14:50:34,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:50:34,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:34,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:50:34,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:34,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:34,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:50:34,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:34,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:50:34,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:50:34,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:50:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:34,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:35,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:35,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 55 [2022-01-28 14:50:35,311 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:35,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:50:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:35,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634041453] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:35,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:35,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:50:35,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160975806] [2022-01-28 14:50:35,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:35,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:50:35,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:35,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:50:35,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:50:35,317 INFO L87 Difference]: Start difference. First operand 1086 states and 3507 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:36,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:36,623 INFO L93 Difference]: Finished difference Result 1769 states and 5265 transitions. [2022-01-28 14:50:36,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 14:50:36,624 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:36,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:36,626 INFO L225 Difference]: With dead ends: 1769 [2022-01-28 14:50:36,626 INFO L226 Difference]: Without dead ends: 1565 [2022-01-28 14:50:36,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=269, Invalid=1537, Unknown=0, NotChecked=0, Total=1806 [2022-01-28 14:50:36,627 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 246 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:36,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 473 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 841 Invalid, 0 Unknown, 249 Unchecked, 0.3s Time] [2022-01-28 14:50:36,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2022-01-28 14:50:36,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1089. [2022-01-28 14:50:36,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1088 states have (on average 3.235294117647059) internal successors, (3520), 1088 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:36,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 3520 transitions. [2022-01-28 14:50:36,643 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 3520 transitions. Word has length 24 [2022-01-28 14:50:36,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:36,643 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 3520 transitions. [2022-01-28 14:50:36,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:36,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 3520 transitions. [2022-01-28 14:50:36,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:36,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:36,644 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:36,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-28 14:50:36,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-01-28 14:50:36,845 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:36,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:36,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1862524707, now seen corresponding path program 63 times [2022-01-28 14:50:36,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:36,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606386581] [2022-01-28 14:50:36,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:36,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:37,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:37,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606386581] [2022-01-28 14:50:37,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606386581] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:37,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936985856] [2022-01-28 14:50:37,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:50:37,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:37,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:37,051 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:37,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-28 14:50:37,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:50:37,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:37,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:50:37,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:37,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:37,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:50:37,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:37,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:37,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:50:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:37,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:37,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:37,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-28 14:50:37,991 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:37,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:50:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:37,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936985856] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:37,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:37,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:50:37,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755687207] [2022-01-28 14:50:37,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:37,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:50:37,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:37,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:50:37,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:50:37,996 INFO L87 Difference]: Start difference. First operand 1089 states and 3520 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:38,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:38,618 INFO L93 Difference]: Finished difference Result 1286 states and 4086 transitions. [2022-01-28 14:50:38,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:50:38,619 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:38,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:38,621 INFO L225 Difference]: With dead ends: 1286 [2022-01-28 14:50:38,621 INFO L226 Difference]: Without dead ends: 1201 [2022-01-28 14:50:38,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:50:38,621 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 106 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:38,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 242 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 555 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-01-28 14:50:38,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-01-28 14:50:38,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1098. [2022-01-28 14:50:38,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1097 states have (on average 3.2415679124886054) internal successors, (3556), 1097 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:38,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 3556 transitions. [2022-01-28 14:50:38,634 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 3556 transitions. Word has length 24 [2022-01-28 14:50:38,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:38,634 INFO L470 AbstractCegarLoop]: Abstraction has 1098 states and 3556 transitions. [2022-01-28 14:50:38,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:38,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 3556 transitions. [2022-01-28 14:50:38,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:38,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:38,636 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:38,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:38,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-01-28 14:50:38,837 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:38,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:38,837 INFO L85 PathProgramCache]: Analyzing trace with hash 883878415, now seen corresponding path program 64 times [2022-01-28 14:50:38,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:38,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45399741] [2022-01-28 14:50:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:38,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:39,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:39,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45399741] [2022-01-28 14:50:39,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45399741] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:39,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964870235] [2022-01-28 14:50:39,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:50:39,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:39,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:39,013 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:39,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-28 14:50:39,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:50:39,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:39,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:50:39,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:39,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:50:39,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:50:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:39,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:40,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:40,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2022-01-28 14:50:40,145 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:40,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:50:40,149 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:40,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964870235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:40,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:40,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:50:40,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719024367] [2022-01-28 14:50:40,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:40,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:40,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:40,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:40,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:40,149 INFO L87 Difference]: Start difference. First operand 1098 states and 3556 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:40,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:40,949 INFO L93 Difference]: Finished difference Result 1668 states and 5244 transitions. [2022-01-28 14:50:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:50:40,950 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:40,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:40,952 INFO L225 Difference]: With dead ends: 1668 [2022-01-28 14:50:40,953 INFO L226 Difference]: Without dead ends: 1606 [2022-01-28 14:50:40,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:50:40,953 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 134 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:40,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 329 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:50:40,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2022-01-28 14:50:40,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1116. [2022-01-28 14:50:40,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 3.24932735426009) internal successors, (3623), 1115 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3623 transitions. [2022-01-28 14:50:40,968 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3623 transitions. Word has length 24 [2022-01-28 14:50:40,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:40,968 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 3623 transitions. [2022-01-28 14:50:40,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3623 transitions. [2022-01-28 14:50:40,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:40,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:40,970 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:40,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:41,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:41,171 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:41,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:41,171 INFO L85 PathProgramCache]: Analyzing trace with hash 399475645, now seen corresponding path program 65 times [2022-01-28 14:50:41,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:41,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208074340] [2022-01-28 14:50:41,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:41,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:41,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:41,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208074340] [2022-01-28 14:50:41,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208074340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:41,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222459971] [2022-01-28 14:50:41,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:50:41,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:41,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:41,347 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:41,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-28 14:50:41,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:50:41,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:41,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:50:41,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:41,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:41,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:50:41,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:50:41,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:41,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:50:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:41,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:42,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:42,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-01-28 14:50:42,271 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:42,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:50:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:42,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222459971] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:42,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:42,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:50:42,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328853187] [2022-01-28 14:50:42,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:42,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:50:42,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:42,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:50:42,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:50:42,277 INFO L87 Difference]: Start difference. First operand 1116 states and 3623 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:43,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:43,453 INFO L93 Difference]: Finished difference Result 1464 states and 4482 transitions. [2022-01-28 14:50:43,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:50:43,454 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:43,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:43,456 INFO L225 Difference]: With dead ends: 1464 [2022-01-28 14:50:43,456 INFO L226 Difference]: Without dead ends: 1335 [2022-01-28 14:50:43,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 14:50:43,456 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 226 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:43,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 418 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 724 Invalid, 0 Unknown, 311 Unchecked, 0.3s Time] [2022-01-28 14:50:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2022-01-28 14:50:43,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1130. [2022-01-28 14:50:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 3.2435783879539417) internal successors, (3662), 1129 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 3662 transitions. [2022-01-28 14:50:43,471 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 3662 transitions. Word has length 24 [2022-01-28 14:50:43,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:43,471 INFO L470 AbstractCegarLoop]: Abstraction has 1130 states and 3662 transitions. [2022-01-28 14:50:43,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 3662 transitions. [2022-01-28 14:50:43,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:43,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:43,473 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:43,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-01-28 14:50:43,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:43,673 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:43,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:43,674 INFO L85 PathProgramCache]: Analyzing trace with hash -2024529937, now seen corresponding path program 66 times [2022-01-28 14:50:43,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:43,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025927937] [2022-01-28 14:50:43,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:43,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:43,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:43,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025927937] [2022-01-28 14:50:43,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025927937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:43,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216445434] [2022-01-28 14:50:43,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:50:43,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:43,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:43,911 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:43,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-28 14:50:43,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:50:43,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:43,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:50:43,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:44,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:44,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:50:44,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:44,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:44,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:50:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:44,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:44,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:44,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2022-01-28 14:50:45,065 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:45,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:50:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:45,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216445434] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:45,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:45,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:50:45,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415474911] [2022-01-28 14:50:45,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:45,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:50:45,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:45,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:50:45,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:50:45,071 INFO L87 Difference]: Start difference. First operand 1130 states and 3662 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:45,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:45,803 INFO L93 Difference]: Finished difference Result 1423 states and 4524 transitions. [2022-01-28 14:50:45,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:50:45,803 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:45,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:45,806 INFO L225 Difference]: With dead ends: 1423 [2022-01-28 14:50:45,806 INFO L226 Difference]: Without dead ends: 1323 [2022-01-28 14:50:45,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:50:45,806 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 111 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:45,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 320 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 617 Invalid, 0 Unknown, 108 Unchecked, 0.3s Time] [2022-01-28 14:50:45,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2022-01-28 14:50:45,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1147. [2022-01-28 14:50:45,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 3.2539267015706805) internal successors, (3729), 1146 states have internal predecessors, (3729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:45,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 3729 transitions. [2022-01-28 14:50:45,822 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 3729 transitions. Word has length 24 [2022-01-28 14:50:45,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:45,822 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 3729 transitions. [2022-01-28 14:50:45,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:45,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 3729 transitions. [2022-01-28 14:50:45,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:45,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:45,824 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:45,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-01-28 14:50:46,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:46,027 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:46,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:46,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1335519751, now seen corresponding path program 67 times [2022-01-28 14:50:46,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:46,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558029333] [2022-01-28 14:50:46,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:46,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:50:46,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:46,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558029333] [2022-01-28 14:50:46,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558029333] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:46,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971028312] [2022-01-28 14:50:46,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:50:46,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:46,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:46,247 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:46,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-28 14:50:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:46,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:50:46,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:46,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:46,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:50:46,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:46,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:46,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:50:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:50:46,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:47,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:47,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2022-01-28 14:50:47,407 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:47,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:50:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:50:47,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971028312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:47,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:47,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:50:47,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15321063] [2022-01-28 14:50:47,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:47,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:50:47,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:47,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:50:47,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:50:47,412 INFO L87 Difference]: Start difference. First operand 1147 states and 3729 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:47,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:47,867 INFO L93 Difference]: Finished difference Result 1482 states and 4731 transitions. [2022-01-28 14:50:47,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:50:47,867 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:47,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:47,870 INFO L225 Difference]: With dead ends: 1482 [2022-01-28 14:50:47,870 INFO L226 Difference]: Without dead ends: 1432 [2022-01-28 14:50:47,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:50:47,871 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 130 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:47,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 243 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 511 Invalid, 0 Unknown, 115 Unchecked, 0.2s Time] [2022-01-28 14:50:47,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2022-01-28 14:50:47,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1144. [2022-01-28 14:50:47,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 3.252843394575678) internal successors, (3718), 1143 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:47,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 3718 transitions. [2022-01-28 14:50:47,887 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 3718 transitions. Word has length 24 [2022-01-28 14:50:47,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:47,887 INFO L470 AbstractCegarLoop]: Abstraction has 1144 states and 3718 transitions. [2022-01-28 14:50:47,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:47,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 3718 transitions. [2022-01-28 14:50:47,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:47,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:47,889 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:47,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-28 14:50:48,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:48,089 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:48,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:48,090 INFO L85 PathProgramCache]: Analyzing trace with hash 408889953, now seen corresponding path program 68 times [2022-01-28 14:50:48,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:48,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466013560] [2022-01-28 14:50:48,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:48,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:48,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:48,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466013560] [2022-01-28 14:50:48,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466013560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:48,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088388277] [2022-01-28 14:50:48,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:50:48,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:48,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:48,247 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:48,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-28 14:50:48,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:50:48,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:48,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:50:48,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:48,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:50:48,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:50:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:48,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:49,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:49,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2022-01-28 14:50:49,177 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:49,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:50:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:49,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088388277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:49,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:49,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:50:49,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090500461] [2022-01-28 14:50:49,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:49,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:49,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:49,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:49,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:49,182 INFO L87 Difference]: Start difference. First operand 1144 states and 3718 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:49,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:49,977 INFO L93 Difference]: Finished difference Result 2045 states and 6469 transitions. [2022-01-28 14:50:49,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:50:49,978 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:49,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:49,981 INFO L225 Difference]: With dead ends: 2045 [2022-01-28 14:50:49,981 INFO L226 Difference]: Without dead ends: 1983 [2022-01-28 14:50:49,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:50:49,982 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 223 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:49,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 325 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:50:49,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2022-01-28 14:50:49,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1131. [2022-01-28 14:50:49,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 3.241592920353982) internal successors, (3663), 1130 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:49,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 3663 transitions. [2022-01-28 14:50:49,999 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 3663 transitions. Word has length 24 [2022-01-28 14:50:49,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:49,999 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 3663 transitions. [2022-01-28 14:50:49,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:50,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 3663 transitions. [2022-01-28 14:50:50,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:50,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:50,001 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:50,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:50,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-01-28 14:50:50,202 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:50,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:50,202 INFO L85 PathProgramCache]: Analyzing trace with hash -897088681, now seen corresponding path program 69 times [2022-01-28 14:50:50,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:50,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478861089] [2022-01-28 14:50:50,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:50,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:50,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:50,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478861089] [2022-01-28 14:50:50,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478861089] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:50,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924518568] [2022-01-28 14:50:50,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:50:50,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:50,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:50,369 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:50,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-28 14:50:50,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:50:50,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:50,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:50:50,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:50,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:50:50,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:50:50,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:50:50,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:50:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:50,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:51,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:51,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-01-28 14:50:51,264 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:51,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:50:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:51,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924518568] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:51,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:51,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:50:51,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411681981] [2022-01-28 14:50:51,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:51,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:50:51,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:51,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:50:51,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:50:51,268 INFO L87 Difference]: Start difference. First operand 1131 states and 3663 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:55,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:55,144 INFO L93 Difference]: Finished difference Result 2235 states and 6756 transitions. [2022-01-28 14:50:55,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-28 14:50:55,145 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:55,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:55,148 INFO L225 Difference]: With dead ends: 2235 [2022-01-28 14:50:55,148 INFO L226 Difference]: Without dead ends: 2012 [2022-01-28 14:50:55,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=922, Invalid=3770, Unknown=0, NotChecked=0, Total=4692 [2022-01-28 14:50:55,149 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 287 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:55,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 554 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 14:50:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2022-01-28 14:50:55,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1164. [2022-01-28 14:50:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1163 states have (on average 3.250214961306965) internal successors, (3780), 1163 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:55,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 3780 transitions. [2022-01-28 14:50:55,169 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 3780 transitions. Word has length 24 [2022-01-28 14:50:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:55,169 INFO L470 AbstractCegarLoop]: Abstraction has 1164 states and 3780 transitions. [2022-01-28 14:50:55,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:55,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 3780 transitions. [2022-01-28 14:50:55,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:55,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:55,171 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:55,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-01-28 14:50:55,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:55,371 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:55,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:55,371 INFO L85 PathProgramCache]: Analyzing trace with hash -644517783, now seen corresponding path program 70 times [2022-01-28 14:50:55,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:55,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470768467] [2022-01-28 14:50:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:55,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:55,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:55,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470768467] [2022-01-28 14:50:55,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470768467] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:55,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131330924] [2022-01-28 14:50:55,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:50:55,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:55,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:55,536 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:55,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-28 14:50:55,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:50:55,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:55,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:50:55,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:55,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:55,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:50:55,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:55,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:50:55,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:50:55,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:50:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:55,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:56,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:56,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:50:56,595 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:56,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:50:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:56,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131330924] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:56,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:56,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:50:56,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901087745] [2022-01-28 14:50:56,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:56,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:50:56,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:56,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:50:56,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:50:56,600 INFO L87 Difference]: Start difference. First operand 1164 states and 3780 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:56,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:56,844 INFO L93 Difference]: Finished difference Result 1289 states and 4133 transitions. [2022-01-28 14:50:56,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:50:56,845 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:56,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:56,846 INFO L225 Difference]: With dead ends: 1289 [2022-01-28 14:50:56,846 INFO L226 Difference]: Without dead ends: 1254 [2022-01-28 14:50:56,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:50:56,847 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:56,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 235 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 555 Invalid, 0 Unknown, 292 Unchecked, 0.2s Time] [2022-01-28 14:50:56,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2022-01-28 14:50:56,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1166. [2022-01-28 14:50:56,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1165 states have (on average 3.2489270386266096) internal successors, (3785), 1165 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:56,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 3785 transitions. [2022-01-28 14:50:56,860 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 3785 transitions. Word has length 24 [2022-01-28 14:50:56,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:56,860 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 3785 transitions. [2022-01-28 14:50:56,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:56,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 3785 transitions. [2022-01-28 14:50:56,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:56,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:56,862 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:56,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:57,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:57,075 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:57,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:57,076 INFO L85 PathProgramCache]: Analyzing trace with hash 724811151, now seen corresponding path program 71 times [2022-01-28 14:50:57,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:57,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535736255] [2022-01-28 14:50:57,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:57,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:57,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:57,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535736255] [2022-01-28 14:50:57,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535736255] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:57,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614980499] [2022-01-28 14:50:57,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:50:57,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:57,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:57,192 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:57,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-28 14:50:57,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:50:57,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:57,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:50:57,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:57,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:57,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:50:57,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:57,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:57,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:50:57,573 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:57,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:58,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:58,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2022-01-28 14:50:58,217 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:58,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:50:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:58,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614980499] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:58,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:58,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:50:58,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049447099] [2022-01-28 14:50:58,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:58,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:50:58,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:58,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:50:58,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:50:58,223 INFO L87 Difference]: Start difference. First operand 1166 states and 3785 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:58,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:58,339 INFO L93 Difference]: Finished difference Result 1357 states and 4339 transitions. [2022-01-28 14:50:58,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:50:58,340 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:50:58,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:58,342 INFO L225 Difference]: With dead ends: 1357 [2022-01-28 14:50:58,342 INFO L226 Difference]: Without dead ends: 1326 [2022-01-28 14:50:58,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:50:58,342 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 51 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:58,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 237 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 226 Invalid, 0 Unknown, 204 Unchecked, 0.1s Time] [2022-01-28 14:50:58,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2022-01-28 14:50:58,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 1170. [2022-01-28 14:50:58,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.2489307100085543) internal successors, (3798), 1169 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 3798 transitions. [2022-01-28 14:50:58,357 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 3798 transitions. Word has length 24 [2022-01-28 14:50:58,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:58,357 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 3798 transitions. [2022-01-28 14:50:58,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:58,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 3798 transitions. [2022-01-28 14:50:58,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:50:58,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:58,359 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:58,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:58,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:58,575 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:58,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:58,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1719131341, now seen corresponding path program 72 times [2022-01-28 14:50:58,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:58,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885472854] [2022-01-28 14:50:58,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:58,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:58,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:58,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885472854] [2022-01-28 14:50:58,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885472854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:58,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788901609] [2022-01-28 14:50:58,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:50:58,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:58,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:58,756 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:50:58,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-28 14:50:58,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:50:58,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:58,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:50:58,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:58,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:58,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:50:59,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:59,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:59,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:50:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:50:59,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:59,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:59,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:51:00,033 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:00,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:51:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:00,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788901609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:00,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:00,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:51:00,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372956591] [2022-01-28 14:51:00,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:00,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:51:00,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:00,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:51:00,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:51:00,039 INFO L87 Difference]: Start difference. First operand 1170 states and 3798 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:00,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:00,236 INFO L93 Difference]: Finished difference Result 1314 states and 4235 transitions. [2022-01-28 14:51:00,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:51:00,236 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:00,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:00,239 INFO L225 Difference]: With dead ends: 1314 [2022-01-28 14:51:00,239 INFO L226 Difference]: Without dead ends: 1283 [2022-01-28 14:51:00,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:51:00,239 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:00,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 178 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 377 Invalid, 0 Unknown, 196 Unchecked, 0.1s Time] [2022-01-28 14:51:00,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2022-01-28 14:51:00,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1177. [2022-01-28 14:51:00,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 3.253401360544218) internal successors, (3826), 1176 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:00,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 3826 transitions. [2022-01-28 14:51:00,254 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 3826 transitions. Word has length 24 [2022-01-28 14:51:00,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:00,254 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 3826 transitions. [2022-01-28 14:51:00,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:00,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 3826 transitions. [2022-01-28 14:51:00,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:00,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:00,256 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:00,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-01-28 14:51:00,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-01-28 14:51:00,456 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:00,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:00,456 INFO L85 PathProgramCache]: Analyzing trace with hash -933769463, now seen corresponding path program 73 times [2022-01-28 14:51:00,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:00,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640169045] [2022-01-28 14:51:00,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:00,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:00,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:00,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640169045] [2022-01-28 14:51:00,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640169045] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:00,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40070002] [2022-01-28 14:51:00,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:51:00,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:00,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:00,638 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:00,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-28 14:51:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:00,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:51:00,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:00,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:00,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:00,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:00,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:51:00,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:51:00,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:51:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:01,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:01,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:01,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:51:01,694 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:01,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:51:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:01,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40070002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:01,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:01,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:51:01,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979076558] [2022-01-28 14:51:01,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:01,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:51:01,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:01,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:51:01,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:51:01,700 INFO L87 Difference]: Start difference. First operand 1177 states and 3826 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:01,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:01,936 INFO L93 Difference]: Finished difference Result 1300 states and 4179 transitions. [2022-01-28 14:51:01,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:51:01,937 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:01,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:01,939 INFO L225 Difference]: With dead ends: 1300 [2022-01-28 14:51:01,939 INFO L226 Difference]: Without dead ends: 1269 [2022-01-28 14:51:01,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:51:01,939 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 327 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:01,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 173 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 466 Invalid, 0 Unknown, 327 Unchecked, 0.2s Time] [2022-01-28 14:51:01,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2022-01-28 14:51:01,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1177. [2022-01-28 14:51:01,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 3.253401360544218) internal successors, (3826), 1176 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:01,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 3826 transitions. [2022-01-28 14:51:01,953 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 3826 transitions. Word has length 24 [2022-01-28 14:51:01,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:01,953 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 3826 transitions. [2022-01-28 14:51:01,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:01,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 3826 transitions. [2022-01-28 14:51:01,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:01,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:01,955 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:01,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:02,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:02,159 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:02,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:02,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1912274509, now seen corresponding path program 74 times [2022-01-28 14:51:02,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:02,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035075408] [2022-01-28 14:51:02,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:02,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:02,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:02,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035075408] [2022-01-28 14:51:02,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035075408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:02,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224562171] [2022-01-28 14:51:02,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:51:02,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:02,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:02,333 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:02,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-28 14:51:02,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:51:02,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:02,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:51:02,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:02,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:02,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:02,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:51:02,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:02,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:51:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:02,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:03,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:03,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:51:03,277 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:03,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:51:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:03,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224562171] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:03,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:03,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:51:03,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869762016] [2022-01-28 14:51:03,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:03,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:51:03,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:03,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:51:03,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:03,283 INFO L87 Difference]: Start difference. First operand 1177 states and 3826 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:04,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:04,042 INFO L93 Difference]: Finished difference Result 1396 states and 4467 transitions. [2022-01-28 14:51:04,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:51:04,042 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:04,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:04,051 INFO L225 Difference]: With dead ends: 1396 [2022-01-28 14:51:04,051 INFO L226 Difference]: Without dead ends: 1365 [2022-01-28 14:51:04,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:51:04,052 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 80 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:04,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 279 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 741 Invalid, 0 Unknown, 64 Unchecked, 0.3s Time] [2022-01-28 14:51:04,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2022-01-28 14:51:04,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1178. [2022-01-28 14:51:04,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 3.2548853016142734) internal successors, (3831), 1177 states have internal predecessors, (3831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:04,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 3831 transitions. [2022-01-28 14:51:04,065 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 3831 transitions. Word has length 24 [2022-01-28 14:51:04,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:04,065 INFO L470 AbstractCegarLoop]: Abstraction has 1178 states and 3831 transitions. [2022-01-28 14:51:04,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:04,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 3831 transitions. [2022-01-28 14:51:04,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:04,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:04,067 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:04,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:04,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:04,268 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:04,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:04,268 INFO L85 PathProgramCache]: Analyzing trace with hash 773714397, now seen corresponding path program 75 times [2022-01-28 14:51:04,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:04,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782276891] [2022-01-28 14:51:04,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:04,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:04,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:04,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782276891] [2022-01-28 14:51:04,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782276891] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:04,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762951511] [2022-01-28 14:51:04,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:51:04,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:04,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:04,475 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:04,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-28 14:51:04,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:51:04,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:04,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:51:04,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:04,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:04,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:04,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:04,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:51:04,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:51:04,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:51:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:04,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:05,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:05,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2022-01-28 14:51:05,675 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:05,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:51:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:05,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762951511] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:05,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:05,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:51:05,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973585138] [2022-01-28 14:51:05,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:05,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:51:05,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:05,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:51:05,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:51:05,681 INFO L87 Difference]: Start difference. First operand 1178 states and 3831 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:07,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:07,324 INFO L93 Difference]: Finished difference Result 2038 states and 6090 transitions. [2022-01-28 14:51:07,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-28 14:51:07,324 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:07,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:07,327 INFO L225 Difference]: With dead ends: 2038 [2022-01-28 14:51:07,327 INFO L226 Difference]: Without dead ends: 1865 [2022-01-28 14:51:07,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=313, Invalid=1667, Unknown=0, NotChecked=0, Total=1980 [2022-01-28 14:51:07,328 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 365 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:07,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 379 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 865 Invalid, 0 Unknown, 102 Unchecked, 0.4s Time] [2022-01-28 14:51:07,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2022-01-28 14:51:07,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1185. [2022-01-28 14:51:07,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1184 states have (on average 3.2652027027027026) internal successors, (3866), 1184 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 3866 transitions. [2022-01-28 14:51:07,346 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 3866 transitions. Word has length 24 [2022-01-28 14:51:07,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:07,346 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 3866 transitions. [2022-01-28 14:51:07,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:07,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 3866 transitions. [2022-01-28 14:51:07,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:07,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:07,348 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:07,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:07,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:07,548 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:07,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:07,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1279171805, now seen corresponding path program 76 times [2022-01-28 14:51:07,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:07,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441860652] [2022-01-28 14:51:07,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:07,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:07,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:07,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441860652] [2022-01-28 14:51:07,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441860652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:07,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356339182] [2022-01-28 14:51:07,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:51:07,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:07,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:07,771 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:07,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-28 14:51:07,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:51:07,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:07,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:51:07,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:07,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:07,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:08,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:51:08,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:08,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:51:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:08,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:09,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:09,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2022-01-28 14:51:09,209 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:09,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:51:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:09,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356339182] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:09,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:09,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:51:09,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489705059] [2022-01-28 14:51:09,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:09,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:51:09,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:09,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:51:09,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:51:09,215 INFO L87 Difference]: Start difference. First operand 1185 states and 3866 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:10,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:10,216 INFO L93 Difference]: Finished difference Result 1775 states and 5454 transitions. [2022-01-28 14:51:10,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:51:10,216 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:10,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:10,219 INFO L225 Difference]: With dead ends: 1775 [2022-01-28 14:51:10,219 INFO L226 Difference]: Without dead ends: 1612 [2022-01-28 14:51:10,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 14:51:10,220 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 199 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 428 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:10,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 363 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 887 Invalid, 0 Unknown, 428 Unchecked, 0.4s Time] [2022-01-28 14:51:10,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2022-01-28 14:51:10,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1215. [2022-01-28 14:51:10,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 3.2932454695222404) internal successors, (3998), 1214 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:10,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3998 transitions. [2022-01-28 14:51:10,237 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3998 transitions. Word has length 24 [2022-01-28 14:51:10,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:10,237 INFO L470 AbstractCegarLoop]: Abstraction has 1215 states and 3998 transitions. [2022-01-28 14:51:10,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3998 transitions. [2022-01-28 14:51:10,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:10,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:10,238 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:10,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:10,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:10,439 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:10,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:10,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1248133691, now seen corresponding path program 77 times [2022-01-28 14:51:10,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:10,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971978743] [2022-01-28 14:51:10,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:10,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:10,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:10,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971978743] [2022-01-28 14:51:10,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971978743] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:10,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939966614] [2022-01-28 14:51:10,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:51:10,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:10,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:10,638 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:10,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-28 14:51:10,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:51:10,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:10,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:51:10,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:10,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:10,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:10,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:10,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:51:10,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:51:10,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:51:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:10,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:11,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:11,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:51:11,615 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:11,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:51:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:11,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939966614] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:11,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:11,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:51:11,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337986629] [2022-01-28 14:51:11,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:11,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:51:11,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:11,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:51:11,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:51:11,621 INFO L87 Difference]: Start difference. First operand 1215 states and 3998 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:11,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:11,921 INFO L93 Difference]: Finished difference Result 1359 states and 4362 transitions. [2022-01-28 14:51:11,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:51:11,921 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:11,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:11,923 INFO L225 Difference]: With dead ends: 1359 [2022-01-28 14:51:11,923 INFO L226 Difference]: Without dead ends: 1293 [2022-01-28 14:51:11,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:51:11,924 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 73 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:11,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 194 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 442 Invalid, 0 Unknown, 244 Unchecked, 0.2s Time] [2022-01-28 14:51:11,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-01-28 14:51:11,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1215. [2022-01-28 14:51:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 3.2932454695222404) internal successors, (3998), 1214 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3998 transitions. [2022-01-28 14:51:11,938 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3998 transitions. Word has length 24 [2022-01-28 14:51:11,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:11,938 INFO L470 AbstractCegarLoop]: Abstraction has 1215 states and 3998 transitions. [2022-01-28 14:51:11,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3998 transitions. [2022-01-28 14:51:11,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:11,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:11,940 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:11,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:12,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:12,140 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:12,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:12,141 INFO L85 PathProgramCache]: Analyzing trace with hash 658193683, now seen corresponding path program 78 times [2022-01-28 14:51:12,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:12,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909223504] [2022-01-28 14:51:12,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:12,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:12,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:12,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909223504] [2022-01-28 14:51:12,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909223504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:12,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395254281] [2022-01-28 14:51:12,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:51:12,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:12,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:12,345 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:12,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-28 14:51:12,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:51:12,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:12,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:51:12,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:12,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:12,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:12,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:12,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:12,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:51:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:12,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:13,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:13,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2022-01-28 14:51:13,601 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:13,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:51:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:13,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395254281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:13,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:13,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:51:13,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076672214] [2022-01-28 14:51:13,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:13,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:51:13,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:13,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:51:13,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:51:13,608 INFO L87 Difference]: Start difference. First operand 1215 states and 3998 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:14,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:14,369 INFO L93 Difference]: Finished difference Result 1666 states and 5169 transitions. [2022-01-28 14:51:14,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:51:14,370 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:14,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:14,373 INFO L225 Difference]: With dead ends: 1666 [2022-01-28 14:51:14,373 INFO L226 Difference]: Without dead ends: 1484 [2022-01-28 14:51:14,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:51:14,373 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 139 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 551 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:14,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 391 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 731 Invalid, 0 Unknown, 551 Unchecked, 0.3s Time] [2022-01-28 14:51:14,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2022-01-28 14:51:14,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1233. [2022-01-28 14:51:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 3.2954545454545454) internal successors, (4060), 1232 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 4060 transitions. [2022-01-28 14:51:14,389 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 4060 transitions. Word has length 24 [2022-01-28 14:51:14,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:14,389 INFO L470 AbstractCegarLoop]: Abstraction has 1233 states and 4060 transitions. [2022-01-28 14:51:14,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:14,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 4060 transitions. [2022-01-28 14:51:14,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:14,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:14,391 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:14,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-01-28 14:51:14,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:14,592 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:14,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:14,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1565752419, now seen corresponding path program 79 times [2022-01-28 14:51:14,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:14,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380332792] [2022-01-28 14:51:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:14,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:14,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:14,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380332792] [2022-01-28 14:51:14,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380332792] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:14,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363587661] [2022-01-28 14:51:14,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:51:14,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:14,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:14,771 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:14,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-28 14:51:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:14,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:51:14,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:14,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:14,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:15,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:15,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:51:15,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-28 14:51:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:15,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:15,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:15,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:51:15,997 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:15,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:51:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:16,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363587661] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:16,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:16,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:51:16,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886700998] [2022-01-28 14:51:16,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:16,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:51:16,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:16,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:51:16,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:51:16,003 INFO L87 Difference]: Start difference. First operand 1233 states and 4060 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:16,060 INFO L93 Difference]: Finished difference Result 1289 states and 4197 transitions. [2022-01-28 14:51:16,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:51:16,060 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:16,062 INFO L225 Difference]: With dead ends: 1289 [2022-01-28 14:51:16,062 INFO L226 Difference]: Without dead ends: 1282 [2022-01-28 14:51:16,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:51:16,063 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:16,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 184 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 104 Invalid, 0 Unknown, 115 Unchecked, 0.0s Time] [2022-01-28 14:51:16,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2022-01-28 14:51:16,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1232. [2022-01-28 14:51:16,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 3.2956945572705116) internal successors, (4057), 1231 states have internal predecessors, (4057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:16,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 4057 transitions. [2022-01-28 14:51:16,079 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 4057 transitions. Word has length 24 [2022-01-28 14:51:16,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:16,079 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 4057 transitions. [2022-01-28 14:51:16,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:16,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 4057 transitions. [2022-01-28 14:51:16,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:16,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:16,080 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:16,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-01-28 14:51:16,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2022-01-28 14:51:16,297 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:16,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:16,297 INFO L85 PathProgramCache]: Analyzing trace with hash -357766465, now seen corresponding path program 80 times [2022-01-28 14:51:16,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:16,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808986147] [2022-01-28 14:51:16,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:16,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:16,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:16,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808986147] [2022-01-28 14:51:16,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808986147] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:16,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141195157] [2022-01-28 14:51:16,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:51:16,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:16,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:16,459 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:16,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-28 14:51:16,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:51:16,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:16,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:51:16,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:16,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:16,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:51:16,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:51:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:16,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:17,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:17,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:51:17,563 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:17,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:51:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:17,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141195157] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:17,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:17,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:51:17,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936311264] [2022-01-28 14:51:17,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:17,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:51:17,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:17,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:51:17,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:51:17,569 INFO L87 Difference]: Start difference. First operand 1232 states and 4057 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:18,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:18,214 INFO L93 Difference]: Finished difference Result 1441 states and 4656 transitions. [2022-01-28 14:51:18,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:51:18,215 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:18,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:18,217 INFO L225 Difference]: With dead ends: 1441 [2022-01-28 14:51:18,217 INFO L226 Difference]: Without dead ends: 1426 [2022-01-28 14:51:18,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:51:18,218 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 129 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:18,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 282 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:51:18,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2022-01-28 14:51:18,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1232. [2022-01-28 14:51:18,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 3.2956945572705116) internal successors, (4057), 1231 states have internal predecessors, (4057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:18,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 4057 transitions. [2022-01-28 14:51:18,233 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 4057 transitions. Word has length 24 [2022-01-28 14:51:18,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:18,233 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 4057 transitions. [2022-01-28 14:51:18,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 4057 transitions. [2022-01-28 14:51:18,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:18,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:18,235 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:18,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:18,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:18,435 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:18,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1063990487, now seen corresponding path program 81 times [2022-01-28 14:51:18,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:18,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355776500] [2022-01-28 14:51:18,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:18,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:18,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:18,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355776500] [2022-01-28 14:51:18,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355776500] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:18,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302556419] [2022-01-28 14:51:18,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:51:18,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:18,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:18,660 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:18,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-28 14:51:18,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:51:18,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:18,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:51:18,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:18,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:18,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:18,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:18,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:18,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:51:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:18,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:19,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:19,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-28 14:51:19,636 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:19,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:51:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:19,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302556419] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:19,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:19,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:51:19,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378627918] [2022-01-28 14:51:19,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:19,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:51:19,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:19,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:51:19,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:51:19,642 INFO L87 Difference]: Start difference. First operand 1232 states and 4057 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:20,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:20,287 INFO L93 Difference]: Finished difference Result 1471 states and 4743 transitions. [2022-01-28 14:51:20,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:51:20,287 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:20,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:20,290 INFO L225 Difference]: With dead ends: 1471 [2022-01-28 14:51:20,290 INFO L226 Difference]: Without dead ends: 1414 [2022-01-28 14:51:20,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:51:20,290 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 110 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:20,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 270 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 633 Invalid, 0 Unknown, 177 Unchecked, 0.2s Time] [2022-01-28 14:51:20,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2022-01-28 14:51:20,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 1232. [2022-01-28 14:51:20,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 3.2956945572705116) internal successors, (4057), 1231 states have internal predecessors, (4057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:20,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 4057 transitions. [2022-01-28 14:51:20,306 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 4057 transitions. Word has length 24 [2022-01-28 14:51:20,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:20,306 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 4057 transitions. [2022-01-28 14:51:20,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:20,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 4057 transitions. [2022-01-28 14:51:20,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:20,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:20,308 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:20,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:20,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:20,508 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:20,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:20,508 INFO L85 PathProgramCache]: Analyzing trace with hash -752228169, now seen corresponding path program 82 times [2022-01-28 14:51:20,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:20,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438091217] [2022-01-28 14:51:20,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:20,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:51:20,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:20,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438091217] [2022-01-28 14:51:20,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438091217] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:20,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069591710] [2022-01-28 14:51:20,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:51:20,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:20,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:20,685 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:20,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-28 14:51:20,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:51:20,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:20,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:51:20,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:20,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:20,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:20,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:20,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:51:20,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:51:20,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:51:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:51:21,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:21,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:21,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2022-01-28 14:51:21,672 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:21,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:51:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:51:21,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069591710] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:21,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:21,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:51:21,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083180709] [2022-01-28 14:51:21,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:21,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:51:21,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:21,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:51:21,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:21,678 INFO L87 Difference]: Start difference. First operand 1232 states and 4057 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:21,902 INFO L93 Difference]: Finished difference Result 1352 states and 4396 transitions. [2022-01-28 14:51:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:51:21,902 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:21,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:21,904 INFO L225 Difference]: With dead ends: 1352 [2022-01-28 14:51:21,904 INFO L226 Difference]: Without dead ends: 1333 [2022-01-28 14:51:21,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:21,905 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:21,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 260 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 563 Invalid, 0 Unknown, 78 Unchecked, 0.2s Time] [2022-01-28 14:51:21,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-01-28 14:51:21,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1236. [2022-01-28 14:51:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.2955465587044532) internal successors, (4070), 1235 states have internal predecessors, (4070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:21,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 4070 transitions. [2022-01-28 14:51:21,926 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 4070 transitions. Word has length 24 [2022-01-28 14:51:21,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:21,926 INFO L470 AbstractCegarLoop]: Abstraction has 1236 states and 4070 transitions. [2022-01-28 14:51:21,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:21,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 4070 transitions. [2022-01-28 14:51:21,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:21,927 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:21,927 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:21,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-01-28 14:51:22,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-01-28 14:51:22,128 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:22,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:22,129 INFO L85 PathProgramCache]: Analyzing trace with hash -499094101, now seen corresponding path program 83 times [2022-01-28 14:51:22,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:22,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403726318] [2022-01-28 14:51:22,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:22,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:22,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:22,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403726318] [2022-01-28 14:51:22,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403726318] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:22,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721496222] [2022-01-28 14:51:22,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:51:22,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:22,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:22,336 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:22,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-28 14:51:22,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:51:22,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:22,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:51:22,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:22,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:22,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:22,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:22,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:51:22,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:51:22,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:51:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:22,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:23,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:23,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-28 14:51:23,318 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:23,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:51:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:23,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721496222] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:23,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:23,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:51:23,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924807368] [2022-01-28 14:51:23,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:23,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:51:23,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:23,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:51:23,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:51:23,324 INFO L87 Difference]: Start difference. First operand 1236 states and 4070 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:24,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:24,005 INFO L93 Difference]: Finished difference Result 1452 states and 4662 transitions. [2022-01-28 14:51:24,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:51:24,005 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:24,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:24,008 INFO L225 Difference]: With dead ends: 1452 [2022-01-28 14:51:24,008 INFO L226 Difference]: Without dead ends: 1395 [2022-01-28 14:51:24,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:51:24,008 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 101 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:24,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 232 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 604 Invalid, 0 Unknown, 144 Unchecked, 0.2s Time] [2022-01-28 14:51:24,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2022-01-28 14:51:24,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1239. [2022-01-28 14:51:24,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 3.297253634894992) internal successors, (4082), 1238 states have internal predecessors, (4082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:24,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 4082 transitions. [2022-01-28 14:51:24,024 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 4082 transitions. Word has length 24 [2022-01-28 14:51:24,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:24,024 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 4082 transitions. [2022-01-28 14:51:24,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 4082 transitions. [2022-01-28 14:51:24,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:24,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:24,025 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:24,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-01-28 14:51:24,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:24,226 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:24,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:24,226 INFO L85 PathProgramCache]: Analyzing trace with hash -614614815, now seen corresponding path program 84 times [2022-01-28 14:51:24,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:24,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31038548] [2022-01-28 14:51:24,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:24,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:24,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:24,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31038548] [2022-01-28 14:51:24,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31038548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:24,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714580321] [2022-01-28 14:51:24,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:51:24,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:24,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:24,357 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:24,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-28 14:51:24,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:51:24,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:24,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:51:24,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:24,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:24,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:24,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:51:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:24,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:25,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:25,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 55 [2022-01-28 14:51:25,520 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:25,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-01-28 14:51:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:25,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714580321] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:25,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:25,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:51:25,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516138490] [2022-01-28 14:51:25,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:25,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:51:25,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:25,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:51:25,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:51:25,524 INFO L87 Difference]: Start difference. First operand 1239 states and 4082 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:27,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:27,809 INFO L93 Difference]: Finished difference Result 2364 states and 7289 transitions. [2022-01-28 14:51:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-28 14:51:27,809 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:27,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:27,813 INFO L225 Difference]: With dead ends: 2364 [2022-01-28 14:51:27,813 INFO L226 Difference]: Without dead ends: 2132 [2022-01-28 14:51:27,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=472, Invalid=2284, Unknown=0, NotChecked=0, Total=2756 [2022-01-28 14:51:27,814 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 285 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:27,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 343 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:51:27,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2022-01-28 14:51:27,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 1261. [2022-01-28 14:51:27,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.3039682539682538) internal successors, (4163), 1260 states have internal predecessors, (4163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:27,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4163 transitions. [2022-01-28 14:51:27,837 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4163 transitions. Word has length 24 [2022-01-28 14:51:27,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:27,837 INFO L470 AbstractCegarLoop]: Abstraction has 1261 states and 4163 transitions. [2022-01-28 14:51:27,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:27,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4163 transitions. [2022-01-28 14:51:27,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:27,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:27,839 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:27,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-01-28 14:51:28,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:28,058 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:28,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:28,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1864133825, now seen corresponding path program 85 times [2022-01-28 14:51:28,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:28,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068273897] [2022-01-28 14:51:28,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:28,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:51:28,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:28,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068273897] [2022-01-28 14:51:28,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068273897] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:28,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160071966] [2022-01-28 14:51:28,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:51:28,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:28,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:28,229 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:28,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-28 14:51:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:28,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:51:28,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:28,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:28,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:51:28,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:51:28,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:51:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:51:28,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:29,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:29,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2022-01-28 14:51:29,217 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:29,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-01-28 14:51:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:51:29,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160071966] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:29,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:29,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:51:29,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426026988] [2022-01-28 14:51:29,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:29,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:29,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:29,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:29,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:29,222 INFO L87 Difference]: Start difference. First operand 1261 states and 4163 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:30,300 INFO L93 Difference]: Finished difference Result 1784 states and 5648 transitions. [2022-01-28 14:51:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:51:30,301 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:30,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:30,304 INFO L225 Difference]: With dead ends: 1784 [2022-01-28 14:51:30,304 INFO L226 Difference]: Without dead ends: 1746 [2022-01-28 14:51:30,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 14:51:30,304 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 164 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:30,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 289 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:51:30,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2022-01-28 14:51:30,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1261. [2022-01-28 14:51:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.3047619047619046) internal successors, (4164), 1260 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4164 transitions. [2022-01-28 14:51:30,321 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4164 transitions. Word has length 24 [2022-01-28 14:51:30,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:30,321 INFO L470 AbstractCegarLoop]: Abstraction has 1261 states and 4164 transitions. [2022-01-28 14:51:30,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4164 transitions. [2022-01-28 14:51:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:30,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:30,323 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:30,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:30,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-01-28 14:51:30,524 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:30,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:30,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1839078163, now seen corresponding path program 86 times [2022-01-28 14:51:30,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:30,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194910560] [2022-01-28 14:51:30,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:30,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:30,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:30,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194910560] [2022-01-28 14:51:30,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194910560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:30,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664800421] [2022-01-28 14:51:30,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:51:30,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:30,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:30,685 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:30,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-28 14:51:30,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:51:30,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:30,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:51:30,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:30,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-01-28 14:51:30,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:51:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:30,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:31,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:31,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-28 14:51:31,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:31,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2022-01-28 14:51:31,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:31,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2022-01-28 14:51:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:31,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664800421] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:31,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:31,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-01-28 14:51:31,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601787882] [2022-01-28 14:51:31,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:31,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:51:31,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:31,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:51:31,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:51:31,448 INFO L87 Difference]: Start difference. First operand 1261 states and 4164 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:31,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:31,980 INFO L93 Difference]: Finished difference Result 1654 states and 5233 transitions. [2022-01-28 14:51:31,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:51:31,980 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:31,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:31,983 INFO L225 Difference]: With dead ends: 1654 [2022-01-28 14:51:31,983 INFO L226 Difference]: Without dead ends: 1550 [2022-01-28 14:51:31,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:51:31,984 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 145 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:31,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 249 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:51:31,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2022-01-28 14:51:31,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1272. [2022-01-28 14:51:31,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 3.29897718332022) internal successors, (4193), 1271 states have internal predecessors, (4193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 4193 transitions. [2022-01-28 14:51:32,000 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 4193 transitions. Word has length 24 [2022-01-28 14:51:32,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:32,000 INFO L470 AbstractCegarLoop]: Abstraction has 1272 states and 4193 transitions. [2022-01-28 14:51:32,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 4193 transitions. [2022-01-28 14:51:32,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:32,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:32,002 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:32,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-01-28 14:51:32,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-01-28 14:51:32,203 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:32,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:32,203 INFO L85 PathProgramCache]: Analyzing trace with hash -263182055, now seen corresponding path program 87 times [2022-01-28 14:51:32,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:32,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361861476] [2022-01-28 14:51:32,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:32,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:32,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:32,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361861476] [2022-01-28 14:51:32,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361861476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:32,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445453978] [2022-01-28 14:51:32,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:51:32,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:32,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:32,362 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:32,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-28 14:51:32,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:51:32,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:32,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:51:32,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:32,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:32,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:32,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:32,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:32,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:51:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:32,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:33,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:33,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-28 14:51:33,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:33,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 55 [2022-01-28 14:51:33,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:33,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2022-01-28 14:51:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:33,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445453978] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:33,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:33,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:51:33,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809957025] [2022-01-28 14:51:33,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:33,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:51:33,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:33,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:51:33,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:51:33,224 INFO L87 Difference]: Start difference. First operand 1272 states and 4193 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:33,654 INFO L93 Difference]: Finished difference Result 1438 states and 4632 transitions. [2022-01-28 14:51:33,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:51:33,655 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:33,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:33,657 INFO L225 Difference]: With dead ends: 1438 [2022-01-28 14:51:33,657 INFO L226 Difference]: Without dead ends: 1379 [2022-01-28 14:51:33,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:51:33,658 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 109 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:33,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 307 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 697 Invalid, 0 Unknown, 351 Unchecked, 0.3s Time] [2022-01-28 14:51:33,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-01-28 14:51:33,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1272. [2022-01-28 14:51:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 3.29897718332022) internal successors, (4193), 1271 states have internal predecessors, (4193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:33,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 4193 transitions. [2022-01-28 14:51:33,672 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 4193 transitions. Word has length 24 [2022-01-28 14:51:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:33,672 INFO L470 AbstractCegarLoop]: Abstraction has 1272 states and 4193 transitions. [2022-01-28 14:51:33,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:33,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 4193 transitions. [2022-01-28 14:51:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:33,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:33,674 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:33,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-01-28 14:51:33,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:33,875 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:33,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:33,875 INFO L85 PathProgramCache]: Analyzing trace with hash 900751119, now seen corresponding path program 88 times [2022-01-28 14:51:33,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:33,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582132492] [2022-01-28 14:51:33,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:33,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:34,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:34,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582132492] [2022-01-28 14:51:34,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582132492] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:34,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401851492] [2022-01-28 14:51:34,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:51:34,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:34,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:34,035 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:34,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-28 14:51:34,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:51:34,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:34,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:51:34,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:34,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:34,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-28 14:51:34,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:51:34,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:34,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:51:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:34,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:34,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:34,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-01-28 14:51:34,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:34,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 95 [2022-01-28 14:51:34,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:34,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 71 [2022-01-28 14:51:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:34,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401851492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:34,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:34,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:51:34,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78822592] [2022-01-28 14:51:34,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:34,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:51:34,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:34,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:51:34,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:34,983 INFO L87 Difference]: Start difference. First operand 1272 states and 4193 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:35,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:35,380 INFO L93 Difference]: Finished difference Result 1512 states and 4930 transitions. [2022-01-28 14:51:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:51:35,381 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:35,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:35,383 INFO L225 Difference]: With dead ends: 1512 [2022-01-28 14:51:35,383 INFO L226 Difference]: Without dead ends: 1477 [2022-01-28 14:51:35,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:51:35,384 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 90 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:35,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 224 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 745 Invalid, 0 Unknown, 33 Unchecked, 0.3s Time] [2022-01-28 14:51:35,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2022-01-28 14:51:35,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1272. [2022-01-28 14:51:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 3.29897718332022) internal successors, (4193), 1271 states have internal predecessors, (4193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:35,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 4193 transitions. [2022-01-28 14:51:35,399 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 4193 transitions. Word has length 24 [2022-01-28 14:51:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:35,399 INFO L470 AbstractCegarLoop]: Abstraction has 1272 states and 4193 transitions. [2022-01-28 14:51:35,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 4193 transitions. [2022-01-28 14:51:35,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:35,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:35,401 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:35,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-01-28 14:51:35,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-28 14:51:35,601 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:35,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2022472717, now seen corresponding path program 89 times [2022-01-28 14:51:35,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:35,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872093107] [2022-01-28 14:51:35,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:35,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:35,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:35,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872093107] [2022-01-28 14:51:35,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872093107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:35,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270069715] [2022-01-28 14:51:35,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:51:35,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:35,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:35,777 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:35,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-28 14:51:35,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:51:35,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:35,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:51:35,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:35,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:35,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:36,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:36,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:36,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:51:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:36,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:36,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:36,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 51 [2022-01-28 14:51:36,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:36,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2022-01-28 14:51:36,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:36,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2022-01-28 14:51:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:36,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270069715] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:36,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:36,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:51:36,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842962587] [2022-01-28 14:51:36,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:36,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:51:36,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:36,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:51:36,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:36,625 INFO L87 Difference]: Start difference. First operand 1272 states and 4193 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:37,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:37,047 INFO L93 Difference]: Finished difference Result 1382 states and 4504 transitions. [2022-01-28 14:51:37,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:51:37,048 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:37,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:37,050 INFO L225 Difference]: With dead ends: 1382 [2022-01-28 14:51:37,050 INFO L226 Difference]: Without dead ends: 1323 [2022-01-28 14:51:37,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:51:37,051 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 66 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:37,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 192 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 561 Invalid, 0 Unknown, 107 Unchecked, 0.2s Time] [2022-01-28 14:51:37,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2022-01-28 14:51:37,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1275. [2022-01-28 14:51:37,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1274 states have (on average 3.2982731554160125) internal successors, (4202), 1274 states have internal predecessors, (4202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 4202 transitions. [2022-01-28 14:51:37,082 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 4202 transitions. Word has length 24 [2022-01-28 14:51:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:37,082 INFO L470 AbstractCegarLoop]: Abstraction has 1275 states and 4202 transitions. [2022-01-28 14:51:37,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:37,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 4202 transitions. [2022-01-28 14:51:37,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:37,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:37,084 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:37,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:37,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-01-28 14:51:37,284 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:37,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:37,285 INFO L85 PathProgramCache]: Analyzing trace with hash -858539543, now seen corresponding path program 90 times [2022-01-28 14:51:37,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:37,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402891246] [2022-01-28 14:51:37,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:37,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:37,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:37,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402891246] [2022-01-28 14:51:37,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402891246] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:37,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213215442] [2022-01-28 14:51:37,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:51:37,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:37,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:37,442 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:37,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-28 14:51:37,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:51:37,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:37,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:51:37,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:37,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:37,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-28 14:51:37,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:51:37,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:37,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:51:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:37,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:38,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:38,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2022-01-28 14:51:38,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:38,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 96 [2022-01-28 14:51:38,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:38,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 72 [2022-01-28 14:51:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:38,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213215442] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:38,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:38,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:51:38,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930398503] [2022-01-28 14:51:38,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:38,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:51:38,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:38,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:51:38,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:38,362 INFO L87 Difference]: Start difference. First operand 1275 states and 4202 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:38,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:38,756 INFO L93 Difference]: Finished difference Result 1399 states and 4595 transitions. [2022-01-28 14:51:38,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:51:38,756 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:38,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:38,759 INFO L225 Difference]: With dead ends: 1399 [2022-01-28 14:51:38,759 INFO L226 Difference]: Without dead ends: 1364 [2022-01-28 14:51:38,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:51:38,762 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 78 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:38,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 211 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 751 Invalid, 0 Unknown, 10 Unchecked, 0.3s Time] [2022-01-28 14:51:38,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2022-01-28 14:51:38,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1275. [2022-01-28 14:51:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1274 states have (on average 3.2982731554160125) internal successors, (4202), 1274 states have internal predecessors, (4202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:38,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 4202 transitions. [2022-01-28 14:51:38,777 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 4202 transitions. Word has length 24 [2022-01-28 14:51:38,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:38,777 INFO L470 AbstractCegarLoop]: Abstraction has 1275 states and 4202 transitions. [2022-01-28 14:51:38,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:38,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 4202 transitions. [2022-01-28 14:51:38,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:38,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:38,779 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:38,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-01-28 14:51:38,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-01-28 14:51:38,979 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:38,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:38,980 INFO L85 PathProgramCache]: Analyzing trace with hash 617078035, now seen corresponding path program 91 times [2022-01-28 14:51:38,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:38,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297362776] [2022-01-28 14:51:38,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:38,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:38,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:39,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:39,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297362776] [2022-01-28 14:51:39,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297362776] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:39,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800962506] [2022-01-28 14:51:39,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:51:39,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:39,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:39,167 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:39,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-28 14:51:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:39,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:51:39,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:39,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:51:39,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:39,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:51:39,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:39,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:51:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:39,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:39,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:39,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2022-01-28 14:51:40,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:40,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 99 [2022-01-28 14:51:40,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:40,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 75 [2022-01-28 14:51:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:40,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800962506] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:40,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:40,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:51:40,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352690255] [2022-01-28 14:51:40,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:40,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:51:40,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:40,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:51:40,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:40,123 INFO L87 Difference]: Start difference. First operand 1275 states and 4202 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:40,631 INFO L93 Difference]: Finished difference Result 1433 states and 4639 transitions. [2022-01-28 14:51:40,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:51:40,631 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:40,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:40,634 INFO L225 Difference]: With dead ends: 1433 [2022-01-28 14:51:40,634 INFO L226 Difference]: Without dead ends: 1355 [2022-01-28 14:51:40,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:51:40,634 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 82 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:40,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 186 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:51:40,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-01-28 14:51:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1278. [2022-01-28 14:51:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.298355520751762) internal successors, (4212), 1277 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:40,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4212 transitions. [2022-01-28 14:51:40,649 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4212 transitions. Word has length 24 [2022-01-28 14:51:40,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:40,649 INFO L470 AbstractCegarLoop]: Abstraction has 1278 states and 4212 transitions. [2022-01-28 14:51:40,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:40,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4212 transitions. [2022-01-28 14:51:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:40,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:40,651 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:40,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-01-28 14:51:40,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:40,851 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:40,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:40,851 INFO L85 PathProgramCache]: Analyzing trace with hash 2003695823, now seen corresponding path program 92 times [2022-01-28 14:51:40,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:40,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496597595] [2022-01-28 14:51:40,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:40,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:41,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:41,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496597595] [2022-01-28 14:51:41,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496597595] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:41,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064451154] [2022-01-28 14:51:41,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:51:41,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:41,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:41,008 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:41,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-28 14:51:41,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:51:41,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:41,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:51:41,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:41,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:41,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:41,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:51:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:41,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:41,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:41,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 47 [2022-01-28 14:51:41,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:41,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-01-28 14:51:41,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:41,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 54 [2022-01-28 14:51:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:41,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064451154] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:41,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:41,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-01-28 14:51:41,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480161307] [2022-01-28 14:51:41,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:41,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:51:41,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:41,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:51:41,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:51:41,870 INFO L87 Difference]: Start difference. First operand 1278 states and 4212 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:42,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:42,441 INFO L93 Difference]: Finished difference Result 1732 states and 5443 transitions. [2022-01-28 14:51:42,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:51:42,441 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:42,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:42,444 INFO L225 Difference]: With dead ends: 1732 [2022-01-28 14:51:42,444 INFO L226 Difference]: Without dead ends: 1628 [2022-01-28 14:51:42,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:51:42,445 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 103 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:42,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 326 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 576 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2022-01-28 14:51:42,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2022-01-28 14:51:42,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1294. [2022-01-28 14:51:42,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 3.290796597061098) internal successors, (4255), 1293 states have internal predecessors, (4255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:42,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 4255 transitions. [2022-01-28 14:51:42,462 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 4255 transitions. Word has length 24 [2022-01-28 14:51:42,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:42,462 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 4255 transitions. [2022-01-28 14:51:42,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 4255 transitions. [2022-01-28 14:51:42,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:42,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:42,464 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:42,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-01-28 14:51:42,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:42,664 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:42,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:42,664 INFO L85 PathProgramCache]: Analyzing trace with hash -98564395, now seen corresponding path program 93 times [2022-01-28 14:51:42,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:42,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874482638] [2022-01-28 14:51:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:42,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:42,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:42,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874482638] [2022-01-28 14:51:42,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874482638] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:42,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236409493] [2022-01-28 14:51:42,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:51:42,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:42,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:42,840 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:42,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-28 14:51:42,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:51:42,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:42,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:51:42,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:42,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:43,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:43,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:51:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:43,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:43,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:43,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 47 [2022-01-28 14:51:43,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:43,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-01-28 14:51:43,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:43,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 54 [2022-01-28 14:51:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:43,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236409493] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:43,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:43,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:51:43,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688552860] [2022-01-28 14:51:43,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:43,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:51:43,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:43,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:51:43,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:43,758 INFO L87 Difference]: Start difference. First operand 1294 states and 4255 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:45,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:45,402 INFO L93 Difference]: Finished difference Result 2176 states and 6683 transitions. [2022-01-28 14:51:45,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-28 14:51:45,403 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:45,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:45,406 INFO L225 Difference]: With dead ends: 2176 [2022-01-28 14:51:45,406 INFO L226 Difference]: Without dead ends: 2025 [2022-01-28 14:51:45,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=353, Invalid=1903, Unknown=0, NotChecked=0, Total=2256 [2022-01-28 14:51:45,406 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 165 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:45,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 366 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:51:45,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2022-01-28 14:51:45,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1336. [2022-01-28 14:51:45,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.2779026217228466) internal successors, (4376), 1335 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:45,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 4376 transitions. [2022-01-28 14:51:45,426 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 4376 transitions. Word has length 24 [2022-01-28 14:51:45,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:45,426 INFO L470 AbstractCegarLoop]: Abstraction has 1336 states and 4376 transitions. [2022-01-28 14:51:45,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:45,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 4376 transitions. [2022-01-28 14:51:45,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:45,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:45,428 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:45,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:45,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:45,631 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:45,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:45,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1065368779, now seen corresponding path program 94 times [2022-01-28 14:51:45,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:45,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439713414] [2022-01-28 14:51:45,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:45,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:45,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:45,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439713414] [2022-01-28 14:51:45,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439713414] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:45,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941999007] [2022-01-28 14:51:45,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:51:45,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:45,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:45,824 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:45,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-28 14:51:45,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:51:45,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:45,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:51:45,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:45,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:45,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:46,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:51:46,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:46,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:51:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:46,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:46,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:46,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 71 [2022-01-28 14:51:46,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:46,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2022-01-28 14:51:46,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:46,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2022-01-28 14:51:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:46,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941999007] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:46,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:46,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:51:46,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638691993] [2022-01-28 14:51:46,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:46,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:51:46,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:46,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:51:46,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:46,853 INFO L87 Difference]: Start difference. First operand 1336 states and 4376 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:47,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:47,130 INFO L93 Difference]: Finished difference Result 1518 states and 4914 transitions. [2022-01-28 14:51:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:51:47,130 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:47,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:47,132 INFO L225 Difference]: With dead ends: 1518 [2022-01-28 14:51:47,133 INFO L226 Difference]: Without dead ends: 1483 [2022-01-28 14:51:47,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:47,133 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 70 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:47,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 373 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 694 Invalid, 0 Unknown, 111 Unchecked, 0.3s Time] [2022-01-28 14:51:47,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2022-01-28 14:51:47,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1336. [2022-01-28 14:51:47,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.2779026217228466) internal successors, (4376), 1335 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 4376 transitions. [2022-01-28 14:51:47,149 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 4376 transitions. Word has length 24 [2022-01-28 14:51:47,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:47,150 INFO L470 AbstractCegarLoop]: Abstraction has 1336 states and 4376 transitions. [2022-01-28 14:51:47,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 4376 transitions. [2022-01-28 14:51:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:47,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:47,151 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:47,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:47,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-01-28 14:51:47,355 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:47,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:47,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1316129901, now seen corresponding path program 95 times [2022-01-28 14:51:47,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:47,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294627728] [2022-01-28 14:51:47,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:47,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:47,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:47,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294627728] [2022-01-28 14:51:47,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294627728] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:47,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035802310] [2022-01-28 14:51:47,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:51:47,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:47,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:47,520 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:47,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-28 14:51:47,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:51:47,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:47,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:51:47,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:47,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:47,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:47,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:47,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:47,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:51:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:47,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:48,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:48,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 49 [2022-01-28 14:51:48,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:48,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 55 [2022-01-28 14:51:48,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:48,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2022-01-28 14:51:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:48,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035802310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:48,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:48,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:51:48,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144355626] [2022-01-28 14:51:48,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:48,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:51:48,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:48,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:51:48,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:51:48,335 INFO L87 Difference]: Start difference. First operand 1336 states and 4376 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:48,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:48,627 INFO L93 Difference]: Finished difference Result 1602 states and 5118 transitions. [2022-01-28 14:51:48,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:51:48,627 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:48,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:48,630 INFO L225 Difference]: With dead ends: 1602 [2022-01-28 14:51:48,630 INFO L226 Difference]: Without dead ends: 1547 [2022-01-28 14:51:48,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:51:48,630 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 101 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:48,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 270 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 362 Invalid, 0 Unknown, 144 Unchecked, 0.1s Time] [2022-01-28 14:51:48,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2022-01-28 14:51:48,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1338. [2022-01-28 14:51:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.270755422587883) internal successors, (4373), 1337 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:48,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4373 transitions. [2022-01-28 14:51:48,647 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4373 transitions. Word has length 24 [2022-01-28 14:51:48,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:48,647 INFO L470 AbstractCegarLoop]: Abstraction has 1338 states and 4373 transitions. [2022-01-28 14:51:48,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:48,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4373 transitions. [2022-01-28 14:51:48,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:48,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:48,649 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:48,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-01-28 14:51:48,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2022-01-28 14:51:48,849 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:48,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:48,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1142937015, now seen corresponding path program 96 times [2022-01-28 14:51:48,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:48,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287187775] [2022-01-28 14:51:48,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:48,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:49,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:49,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287187775] [2022-01-28 14:51:49,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287187775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:49,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158194819] [2022-01-28 14:51:49,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:51:49,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:49,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:49,007 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:49,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-28 14:51:49,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:51:49,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:49,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:51:49,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:49,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:49,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:49,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:51:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:49,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:49,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:49,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 71 [2022-01-28 14:51:49,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:49,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 99 [2022-01-28 14:51:49,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:49,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 75 [2022-01-28 14:51:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:49,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158194819] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:49,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:49,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-01-28 14:51:49,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982051630] [2022-01-28 14:51:49,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:49,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:51:49,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:49,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:51:49,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:51:49,987 INFO L87 Difference]: Start difference. First operand 1338 states and 4373 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:50,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:50,282 INFO L93 Difference]: Finished difference Result 1656 states and 5288 transitions. [2022-01-28 14:51:50,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:51:50,282 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:50,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:50,285 INFO L225 Difference]: With dead ends: 1656 [2022-01-28 14:51:50,285 INFO L226 Difference]: Without dead ends: 1641 [2022-01-28 14:51:50,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:50,285 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 114 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:50,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 267 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 592 Invalid, 0 Unknown, 266 Unchecked, 0.2s Time] [2022-01-28 14:51:50,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2022-01-28 14:51:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1320. [2022-01-28 14:51:50,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 3.2903714935557242) internal successors, (4340), 1319 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:50,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 4340 transitions. [2022-01-28 14:51:50,301 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 4340 transitions. Word has length 24 [2022-01-28 14:51:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:50,302 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 4340 transitions. [2022-01-28 14:51:50,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:50,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 4340 transitions. [2022-01-28 14:51:50,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:50,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:50,303 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:50,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:50,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-01-28 14:51:50,504 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:50,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:50,504 INFO L85 PathProgramCache]: Analyzing trace with hash 61317007, now seen corresponding path program 97 times [2022-01-28 14:51:50,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:50,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115821064] [2022-01-28 14:51:50,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:50,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:50,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:50,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115821064] [2022-01-28 14:51:50,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115821064] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:50,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175109348] [2022-01-28 14:51:50,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:51:50,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:50,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:50,694 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:50,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-28 14:51:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:50,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:51:50,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:50,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:50,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:51,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:51:51,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:51,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:51:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:51,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:51,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:51,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 71 [2022-01-28 14:51:51,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:51,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 99 [2022-01-28 14:51:51,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:51,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 75 [2022-01-28 14:51:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:51,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175109348] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:51,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:51,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:51:51,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478706775] [2022-01-28 14:51:51,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:51,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:51:51,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:51:51,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:51,893 INFO L87 Difference]: Start difference. First operand 1320 states and 4340 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:52,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:52,090 INFO L93 Difference]: Finished difference Result 1605 states and 5187 transitions. [2022-01-28 14:51:52,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:51:52,091 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:52,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:52,093 INFO L225 Difference]: With dead ends: 1605 [2022-01-28 14:51:52,093 INFO L226 Difference]: Without dead ends: 1574 [2022-01-28 14:51:52,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:52,094 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 107 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:52,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 217 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 471 Invalid, 0 Unknown, 284 Unchecked, 0.2s Time] [2022-01-28 14:51:52,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2022-01-28 14:51:52,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1323. [2022-01-28 14:51:52,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 3.291225416036309) internal successors, (4351), 1322 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:52,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 4351 transitions. [2022-01-28 14:51:52,110 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 4351 transitions. Word has length 24 [2022-01-28 14:51:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:52,110 INFO L470 AbstractCegarLoop]: Abstraction has 1323 states and 4351 transitions. [2022-01-28 14:51:52,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:52,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 4351 transitions. [2022-01-28 14:51:52,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:52,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:52,112 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:52,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-01-28 14:51:52,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:52,313 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:52,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:52,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2140610835, now seen corresponding path program 98 times [2022-01-28 14:51:52,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:52,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446145511] [2022-01-28 14:51:52,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:52,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:52,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:52,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446145511] [2022-01-28 14:51:52,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446145511] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:52,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593669805] [2022-01-28 14:51:52,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:51:52,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:52,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:52,486 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:52,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-28 14:51:52,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:51:52,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:52,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:51:52,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:52,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:52,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:52,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:52,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:52,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:51:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:52,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:53,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:53,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-01-28 14:51:53,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:53,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-01-28 14:51:53,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:53,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-01-28 14:51:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:53,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593669805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:53,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:53,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:51:53,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910588429] [2022-01-28 14:51:53,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:53,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:51:53,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:53,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:51:53,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:53,417 INFO L87 Difference]: Start difference. First operand 1323 states and 4351 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:53,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:53,913 INFO L93 Difference]: Finished difference Result 1648 states and 5294 transitions. [2022-01-28 14:51:53,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:51:53,913 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:53,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:53,916 INFO L225 Difference]: With dead ends: 1648 [2022-01-28 14:51:53,916 INFO L226 Difference]: Without dead ends: 1591 [2022-01-28 14:51:53,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:51:53,916 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 125 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:53,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 304 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 848 Invalid, 0 Unknown, 442 Unchecked, 0.3s Time] [2022-01-28 14:51:53,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2022-01-28 14:51:53,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1326. [2022-01-28 14:51:53,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 3.292075471698113) internal successors, (4362), 1325 states have internal predecessors, (4362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 4362 transitions. [2022-01-28 14:51:53,933 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 4362 transitions. Word has length 24 [2022-01-28 14:51:53,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:53,933 INFO L470 AbstractCegarLoop]: Abstraction has 1326 states and 4362 transitions. [2022-01-28 14:51:53,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:53,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 4362 transitions. [2022-01-28 14:51:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:53,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:53,935 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:53,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:54,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-01-28 14:51:54,136 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:54,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:54,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1577784015, now seen corresponding path program 99 times [2022-01-28 14:51:54,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:54,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692535432] [2022-01-28 14:51:54,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:54,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:54,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:54,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692535432] [2022-01-28 14:51:54,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692535432] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:54,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093862305] [2022-01-28 14:51:54,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:51:54,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:54,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:54,313 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:54,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-28 14:51:54,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:51:54,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:54,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:51:54,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:54,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:54,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:51:54,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:51:54,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:51:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:54,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:55,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:55,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 47 [2022-01-28 14:51:55,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:55,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-01-28 14:51:55,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:55,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 54 [2022-01-28 14:51:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:55,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093862305] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:55,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:55,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:51:55,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349233002] [2022-01-28 14:51:55,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:55,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:51:55,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:55,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:51:55,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:55,371 INFO L87 Difference]: Start difference. First operand 1326 states and 4362 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:57,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:57,249 INFO L93 Difference]: Finished difference Result 2329 states and 7064 transitions. [2022-01-28 14:51:57,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-28 14:51:57,249 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:57,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:57,253 INFO L225 Difference]: With dead ends: 2329 [2022-01-28 14:51:57,253 INFO L226 Difference]: Without dead ends: 2187 [2022-01-28 14:51:57,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=297, Invalid=1683, Unknown=0, NotChecked=0, Total=1980 [2022-01-28 14:51:57,254 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 171 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:57,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 598 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 14:51:57,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2022-01-28 14:51:57,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 1334. [2022-01-28 14:51:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.2955738934733683) internal successors, (4393), 1333 states have internal predecessors, (4393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:57,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4393 transitions. [2022-01-28 14:51:57,275 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4393 transitions. Word has length 24 [2022-01-28 14:51:57,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:57,275 INFO L470 AbstractCegarLoop]: Abstraction has 1334 states and 4393 transitions. [2022-01-28 14:51:57,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:57,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4393 transitions. [2022-01-28 14:51:57,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:57,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:57,277 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:57,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:57,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-01-28 14:51:57,477 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:57,477 INFO L85 PathProgramCache]: Analyzing trace with hash 697014835, now seen corresponding path program 100 times [2022-01-28 14:51:57,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:57,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169446563] [2022-01-28 14:51:57,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:57,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:57,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:57,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169446563] [2022-01-28 14:51:57,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169446563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:57,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564204013] [2022-01-28 14:51:57,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:51:57,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:57,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:57,703 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:51:57,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-28 14:51:57,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:51:57,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:57,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:51:57,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:57,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:51:57,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:57,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:51:57,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:57,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:51:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:58,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:58,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:58,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 71 [2022-01-28 14:51:58,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:58,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 99 [2022-01-28 14:51:58,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:58,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 75 [2022-01-28 14:51:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:51:58,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564204013] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:58,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:58,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:51:58,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812551044] [2022-01-28 14:51:58,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:58,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:51:58,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:58,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:51:58,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:58,838 INFO L87 Difference]: Start difference. First operand 1334 states and 4393 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:59,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:59,808 INFO L93 Difference]: Finished difference Result 1558 states and 4943 transitions. [2022-01-28 14:51:59,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:51:59,809 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:51:59,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:59,812 INFO L225 Difference]: With dead ends: 1558 [2022-01-28 14:51:59,812 INFO L226 Difference]: Without dead ends: 1484 [2022-01-28 14:51:59,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:51:59,812 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 138 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:59,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 262 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 632 Invalid, 0 Unknown, 119 Unchecked, 0.3s Time] [2022-01-28 14:51:59,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2022-01-28 14:51:59,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1334. [2022-01-28 14:51:59,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.2955738934733683) internal successors, (4393), 1333 states have internal predecessors, (4393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:59,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4393 transitions. [2022-01-28 14:51:59,828 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4393 transitions. Word has length 24 [2022-01-28 14:51:59,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:59,828 INFO L470 AbstractCegarLoop]: Abstraction has 1334 states and 4393 transitions. [2022-01-28 14:51:59,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:59,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4393 transitions. [2022-01-28 14:51:59,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:51:59,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:59,830 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:59,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-28 14:52:00,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:00,031 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:00,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:00,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1570777609, now seen corresponding path program 101 times [2022-01-28 14:52:00,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:00,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142123735] [2022-01-28 14:52:00,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:00,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:52:00,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:00,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142123735] [2022-01-28 14:52:00,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142123735] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:00,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599860703] [2022-01-28 14:52:00,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:52:00,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:00,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:00,254 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:00,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-28 14:52:00,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:52:00,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:00,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:52:00,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:00,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:52:00,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:00,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:52:00,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:00,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:52:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:52:00,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:01,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:01,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-01-28 14:52:01,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:01,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-01-28 14:52:01,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:01,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-01-28 14:52:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:52:01,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599860703] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:01,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:01,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:52:01,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254664177] [2022-01-28 14:52:01,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:01,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:52:01,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:01,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:52:01,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:01,171 INFO L87 Difference]: Start difference. First operand 1334 states and 4393 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:01,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:01,907 INFO L93 Difference]: Finished difference Result 1453 states and 4710 transitions. [2022-01-28 14:52:01,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:52:01,907 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:01,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:01,909 INFO L225 Difference]: With dead ends: 1453 [2022-01-28 14:52:01,909 INFO L226 Difference]: Without dead ends: 1434 [2022-01-28 14:52:01,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:52:01,910 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 85 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:01,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 295 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 882 Invalid, 0 Unknown, 6 Unchecked, 0.3s Time] [2022-01-28 14:52:01,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2022-01-28 14:52:01,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1333. [2022-01-28 14:52:01,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 3.294294294294294) internal successors, (4388), 1332 states have internal predecessors, (4388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 4388 transitions. [2022-01-28 14:52:01,934 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 4388 transitions. Word has length 24 [2022-01-28 14:52:01,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:01,935 INFO L470 AbstractCegarLoop]: Abstraction has 1333 states and 4388 transitions. [2022-01-28 14:52:01,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:01,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 4388 transitions. [2022-01-28 14:52:01,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:01,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:01,936 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:01,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:02,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:02,137 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:02,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:02,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1952639283, now seen corresponding path program 102 times [2022-01-28 14:52:02,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:02,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110471156] [2022-01-28 14:52:02,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:02,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:02,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:02,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110471156] [2022-01-28 14:52:02,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110471156] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:02,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970875949] [2022-01-28 14:52:02,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:52:02,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:02,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:02,333 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:02,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-28 14:52:02,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:52:02,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:02,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:52:02,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:02,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:52:02,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:02,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:02,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:02,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:52:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:02,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:03,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:03,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 68 [2022-01-28 14:52:03,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:03,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2022-01-28 14:52:03,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:03,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2022-01-28 14:52:03,441 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:03,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970875949] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:03,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:03,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:52:03,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827633428] [2022-01-28 14:52:03,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:03,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:52:03,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:03,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:52:03,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:52:03,442 INFO L87 Difference]: Start difference. First operand 1333 states and 4388 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:03,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:03,905 INFO L93 Difference]: Finished difference Result 1521 states and 4896 transitions. [2022-01-28 14:52:03,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:52:03,905 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:03,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:03,908 INFO L225 Difference]: With dead ends: 1521 [2022-01-28 14:52:03,908 INFO L226 Difference]: Without dead ends: 1431 [2022-01-28 14:52:03,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:52:03,908 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 66 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:03,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 253 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 769 Invalid, 0 Unknown, 105 Unchecked, 0.3s Time] [2022-01-28 14:52:03,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2022-01-28 14:52:03,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1336. [2022-01-28 14:52:03,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.295880149812734) internal successors, (4400), 1335 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:03,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 4400 transitions. [2022-01-28 14:52:03,923 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 4400 transitions. Word has length 24 [2022-01-28 14:52:03,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:03,923 INFO L470 AbstractCegarLoop]: Abstraction has 1336 states and 4400 transitions. [2022-01-28 14:52:03,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:03,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 4400 transitions. [2022-01-28 14:52:03,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:03,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:03,925 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:03,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-01-28 14:52:04,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-01-28 14:52:04,125 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:04,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:04,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1178394839, now seen corresponding path program 103 times [2022-01-28 14:52:04,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:04,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906081993] [2022-01-28 14:52:04,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:04,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:04,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:04,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906081993] [2022-01-28 14:52:04,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906081993] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:04,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671079788] [2022-01-28 14:52:04,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:52:04,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:04,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:04,296 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:04,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-28 14:52:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:04,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:52:04,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:04,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:52:04,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:52:04,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:52:04,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:52:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:04,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:05,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:05,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:52:05,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:05,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2022-01-28 14:52:05,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:05,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2022-01-28 14:52:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:05,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671079788] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:05,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:05,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:52:05,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664017803] [2022-01-28 14:52:05,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:05,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:52:05,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:05,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:52:05,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:05,335 INFO L87 Difference]: Start difference. First operand 1336 states and 4400 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:06,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:06,018 INFO L93 Difference]: Finished difference Result 1619 states and 5176 transitions. [2022-01-28 14:52:06,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:52:06,018 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:06,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:06,021 INFO L225 Difference]: With dead ends: 1619 [2022-01-28 14:52:06,021 INFO L226 Difference]: Without dead ends: 1518 [2022-01-28 14:52:06,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:52:06,022 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 94 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:06,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 286 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:52:06,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2022-01-28 14:52:06,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1348. [2022-01-28 14:52:06,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 3.29547141796585) internal successors, (4439), 1347 states have internal predecessors, (4439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:06,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 4439 transitions. [2022-01-28 14:52:06,038 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 4439 transitions. Word has length 24 [2022-01-28 14:52:06,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:06,038 INFO L470 AbstractCegarLoop]: Abstraction has 1348 states and 4439 transitions. [2022-01-28 14:52:06,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:06,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 4439 transitions. [2022-01-28 14:52:06,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:06,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:06,040 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:06,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:06,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:06,253 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:06,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:06,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2033777169, now seen corresponding path program 104 times [2022-01-28 14:52:06,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:06,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699301669] [2022-01-28 14:52:06,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:06,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:06,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:06,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699301669] [2022-01-28 14:52:06,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699301669] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:06,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621693639] [2022-01-28 14:52:06,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:52:06,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:06,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:06,440 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:06,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-28 14:52:06,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:52:06,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:06,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:52:06,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:06,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:52:06,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:52:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:06,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:07,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:07,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 68 [2022-01-28 14:52:07,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:07,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2022-01-28 14:52:07,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:07,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2022-01-28 14:52:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:07,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621693639] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:07,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:07,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:52:07,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122408128] [2022-01-28 14:52:07,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:07,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:52:07,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:07,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:52:07,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:52:07,445 INFO L87 Difference]: Start difference. First operand 1348 states and 4439 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:08,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:08,063 INFO L93 Difference]: Finished difference Result 1580 states and 5086 transitions. [2022-01-28 14:52:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:52:08,063 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:08,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:08,066 INFO L225 Difference]: With dead ends: 1580 [2022-01-28 14:52:08,066 INFO L226 Difference]: Without dead ends: 1494 [2022-01-28 14:52:08,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:52:08,066 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 100 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:08,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 235 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:52:08,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-01-28 14:52:08,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1344. [2022-01-28 14:52:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 3.294862248696947) internal successors, (4425), 1343 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:08,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4425 transitions. [2022-01-28 14:52:08,084 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4425 transitions. Word has length 24 [2022-01-28 14:52:08,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:08,084 INFO L470 AbstractCegarLoop]: Abstraction has 1344 states and 4425 transitions. [2022-01-28 14:52:08,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:08,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4425 transitions. [2022-01-28 14:52:08,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:08,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:08,086 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:08,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:08,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:08,287 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:08,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:08,287 INFO L85 PathProgramCache]: Analyzing trace with hash 2041958899, now seen corresponding path program 105 times [2022-01-28 14:52:08,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:08,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779704167] [2022-01-28 14:52:08,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:08,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:08,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:08,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779704167] [2022-01-28 14:52:08,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779704167] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:08,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848865557] [2022-01-28 14:52:08,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:52:08,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:08,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:08,489 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:08,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-28 14:52:08,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:52:08,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:08,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:52:08,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:08,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:52:08,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:08,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:52:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:08,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:09,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:09,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:52:09,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:09,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2022-01-28 14:52:09,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:09,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2022-01-28 14:52:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:09,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848865557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:09,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:09,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:52:09,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861873867] [2022-01-28 14:52:09,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:09,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:52:09,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:09,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:52:09,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:09,771 INFO L87 Difference]: Start difference. First operand 1344 states and 4425 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:10,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:10,228 INFO L93 Difference]: Finished difference Result 1529 states and 4915 transitions. [2022-01-28 14:52:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:52:10,229 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:10,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:10,232 INFO L225 Difference]: With dead ends: 1529 [2022-01-28 14:52:10,232 INFO L226 Difference]: Without dead ends: 1452 [2022-01-28 14:52:10,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:52:10,232 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 116 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:10,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 211 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:52:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2022-01-28 14:52:10,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1351. [2022-01-28 14:52:10,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1350 states have (on average 3.2985185185185184) internal successors, (4453), 1350 states have internal predecessors, (4453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:10,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 4453 transitions. [2022-01-28 14:52:10,258 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 4453 transitions. Word has length 24 [2022-01-28 14:52:10,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:10,258 INFO L470 AbstractCegarLoop]: Abstraction has 1351 states and 4453 transitions. [2022-01-28 14:52:10,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:10,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 4453 transitions. [2022-01-28 14:52:10,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:10,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:10,260 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:10,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:10,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2022-01-28 14:52:10,475 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:10,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:10,476 INFO L85 PathProgramCache]: Analyzing trace with hash -894721755, now seen corresponding path program 106 times [2022-01-28 14:52:10,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:10,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790491398] [2022-01-28 14:52:10,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:10,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:10,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:10,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790491398] [2022-01-28 14:52:10,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790491398] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:10,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186990903] [2022-01-28 14:52:10,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:52:10,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:10,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:10,666 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:10,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-28 14:52:10,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:52:10,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:10,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:52:10,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:10,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:10,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:52:10,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:10,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:52:10,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:10,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:52:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:11,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:11,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:11,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:52:11,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:11,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2022-01-28 14:52:11,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:11,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2022-01-28 14:52:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:11,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186990903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:11,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:11,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:52:11,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335864108] [2022-01-28 14:52:11,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:11,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:11,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:11,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:11,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:11,873 INFO L87 Difference]: Start difference. First operand 1351 states and 4453 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:12,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:12,315 INFO L93 Difference]: Finished difference Result 1492 states and 4840 transitions. [2022-01-28 14:52:12,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:52:12,316 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:12,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:12,318 INFO L225 Difference]: With dead ends: 1492 [2022-01-28 14:52:12,318 INFO L226 Difference]: Without dead ends: 1445 [2022-01-28 14:52:12,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:52:12,319 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 93 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:12,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 170 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 535 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2022-01-28 14:52:12,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2022-01-28 14:52:12,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1351. [2022-01-28 14:52:12,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1350 states have (on average 3.2985185185185184) internal successors, (4453), 1350 states have internal predecessors, (4453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:12,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 4453 transitions. [2022-01-28 14:52:12,334 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 4453 transitions. Word has length 24 [2022-01-28 14:52:12,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:12,335 INFO L470 AbstractCegarLoop]: Abstraction has 1351 states and 4453 transitions. [2022-01-28 14:52:12,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:12,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 4453 transitions. [2022-01-28 14:52:12,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:12,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:12,336 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:12,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:12,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:12,537 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:12,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:12,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1529507877, now seen corresponding path program 107 times [2022-01-28 14:52:12,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:12,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110611952] [2022-01-28 14:52:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:12,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:52:12,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:12,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110611952] [2022-01-28 14:52:12,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110611952] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:12,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194609845] [2022-01-28 14:52:12,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:52:12,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:12,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:12,764 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:12,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-28 14:52:12,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:52:12,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:12,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:52:12,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:12,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:52:12,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:12,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:52:12,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:12,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:52:13,126 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:52:13,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:13,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:13,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2022-01-28 14:52:13,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:13,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-01-28 14:52:13,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:13,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-01-28 14:52:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:52:13,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194609845] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:13,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:13,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:52:13,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271692817] [2022-01-28 14:52:13,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:13,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:52:13,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:13,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:52:13,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:52:13,956 INFO L87 Difference]: Start difference. First operand 1351 states and 4453 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:14,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:14,894 INFO L93 Difference]: Finished difference Result 1628 states and 5153 transitions. [2022-01-28 14:52:14,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:52:14,895 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:14,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:14,898 INFO L225 Difference]: With dead ends: 1628 [2022-01-28 14:52:14,898 INFO L226 Difference]: Without dead ends: 1587 [2022-01-28 14:52:14,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:52:14,898 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 119 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:14,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 444 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1202 Invalid, 0 Unknown, 79 Unchecked, 0.5s Time] [2022-01-28 14:52:14,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2022-01-28 14:52:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1352. [2022-01-28 14:52:14,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.299777942264989) internal successors, (4458), 1351 states have internal predecessors, (4458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4458 transitions. [2022-01-28 14:52:14,915 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4458 transitions. Word has length 24 [2022-01-28 14:52:14,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:14,915 INFO L470 AbstractCegarLoop]: Abstraction has 1352 states and 4458 transitions. [2022-01-28 14:52:14,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4458 transitions. [2022-01-28 14:52:14,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:14,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:14,916 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:14,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:15,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-28 14:52:15,117 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:15,117 INFO L85 PathProgramCache]: Analyzing trace with hash -165436977, now seen corresponding path program 108 times [2022-01-28 14:52:15,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:15,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540474504] [2022-01-28 14:52:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:15,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:15,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:15,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540474504] [2022-01-28 14:52:15,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540474504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:15,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520253933] [2022-01-28 14:52:15,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:52:15,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:15,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:15,356 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:15,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-28 14:52:15,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:52:15,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:15,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:52:15,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:15,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:15,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:15,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:15,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:52:15,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:15,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:52:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:15,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:16,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:16,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:52:16,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:16,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 60 [2022-01-28 14:52:16,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:16,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 46 [2022-01-28 14:52:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:16,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520253933] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:16,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:16,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:52:16,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282427833] [2022-01-28 14:52:16,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:16,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:52:16,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:16,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:52:16,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:16,760 INFO L87 Difference]: Start difference. First operand 1352 states and 4458 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:17,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:17,906 INFO L93 Difference]: Finished difference Result 1864 states and 5786 transitions. [2022-01-28 14:52:17,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:52:17,907 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:17,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:17,910 INFO L225 Difference]: With dead ends: 1864 [2022-01-28 14:52:17,910 INFO L226 Difference]: Without dead ends: 1722 [2022-01-28 14:52:17,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=280, Invalid=1280, Unknown=0, NotChecked=0, Total=1560 [2022-01-28 14:52:17,910 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 202 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:17,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 256 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 779 Invalid, 0 Unknown, 204 Unchecked, 0.4s Time] [2022-01-28 14:52:17,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2022-01-28 14:52:17,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1353. [2022-01-28 14:52:17,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 3.30103550295858) internal successors, (4463), 1352 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 4463 transitions. [2022-01-28 14:52:17,929 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 4463 transitions. Word has length 24 [2022-01-28 14:52:17,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:17,929 INFO L470 AbstractCegarLoop]: Abstraction has 1353 states and 4463 transitions. [2022-01-28 14:52:17,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:17,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 4463 transitions. [2022-01-28 14:52:17,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:17,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:17,931 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:17,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:18,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:18,131 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:18,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:18,131 INFO L85 PathProgramCache]: Analyzing trace with hash 340020431, now seen corresponding path program 109 times [2022-01-28 14:52:18,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:18,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682822049] [2022-01-28 14:52:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:18,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:18,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:18,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682822049] [2022-01-28 14:52:18,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682822049] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:18,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593698267] [2022-01-28 14:52:18,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:52:18,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:18,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:18,356 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:18,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-28 14:52:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:18,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:52:18,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:18,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:18,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:18,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:18,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:52:18,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:18,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:52:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:18,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:19,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:19,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:52:19,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:19,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 60 [2022-01-28 14:52:19,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:19,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 46 [2022-01-28 14:52:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:19,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593698267] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:19,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:19,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:52:19,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694944111] [2022-01-28 14:52:19,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:19,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:52:19,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:19,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:52:19,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:52:19,906 INFO L87 Difference]: Start difference. First operand 1353 states and 4463 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:21,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:21,505 INFO L93 Difference]: Finished difference Result 2243 states and 6789 transitions. [2022-01-28 14:52:21,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-28 14:52:21,506 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:21,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:21,509 INFO L225 Difference]: With dead ends: 2243 [2022-01-28 14:52:21,509 INFO L226 Difference]: Without dead ends: 2067 [2022-01-28 14:52:21,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-01-28 14:52:21,510 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 303 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:21,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 419 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1044 Invalid, 0 Unknown, 247 Unchecked, 0.5s Time] [2022-01-28 14:52:21,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2022-01-28 14:52:21,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1373. [2022-01-28 14:52:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 1372 states have (on average 3.317784256559767) internal successors, (4552), 1372 states have internal predecessors, (4552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:21,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 4552 transitions. [2022-01-28 14:52:21,530 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 4552 transitions. Word has length 24 [2022-01-28 14:52:21,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:21,530 INFO L470 AbstractCegarLoop]: Abstraction has 1373 states and 4552 transitions. [2022-01-28 14:52:21,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:21,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 4552 transitions. [2022-01-28 14:52:21,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:21,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:21,533 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:21,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:21,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-01-28 14:52:21,749 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:21,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:21,749 INFO L85 PathProgramCache]: Analyzing trace with hash 998137971, now seen corresponding path program 110 times [2022-01-28 14:52:21,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:21,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028754525] [2022-01-28 14:52:21,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:21,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:21,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:21,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028754525] [2022-01-28 14:52:21,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028754525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:21,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589253924] [2022-01-28 14:52:21,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:52:21,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:21,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:21,960 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:21,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-28 14:52:21,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:52:21,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:21,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:52:21,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:22,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:22,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:22,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:22,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:52:22,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:22,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 14:52:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:22,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:22,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:22,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:52:23,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:23,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2022-01-28 14:52:23,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:23,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2022-01-28 14:52:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:23,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589253924] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:23,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:23,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:52:23,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323249427] [2022-01-28 14:52:23,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:23,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:52:23,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:23,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:52:23,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:23,159 INFO L87 Difference]: Start difference. First operand 1373 states and 4552 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:23,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:23,800 INFO L93 Difference]: Finished difference Result 1563 states and 5033 transitions. [2022-01-28 14:52:23,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:52:23,800 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:23,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:23,803 INFO L225 Difference]: With dead ends: 1563 [2022-01-28 14:52:23,803 INFO L226 Difference]: Without dead ends: 1481 [2022-01-28 14:52:23,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:52:23,804 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 105 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:23,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 242 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 575 Invalid, 0 Unknown, 159 Unchecked, 0.2s Time] [2022-01-28 14:52:23,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2022-01-28 14:52:23,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1383. [2022-01-28 14:52:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 3.316931982633864) internal successors, (4584), 1382 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 4584 transitions. [2022-01-28 14:52:23,820 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 4584 transitions. Word has length 24 [2022-01-28 14:52:23,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:23,820 INFO L470 AbstractCegarLoop]: Abstraction has 1383 states and 4584 transitions. [2022-01-28 14:52:23,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:23,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 4584 transitions. [2022-01-28 14:52:23,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:23,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:23,822 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:23,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:24,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-01-28 14:52:24,023 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:24,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:24,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1214886259, now seen corresponding path program 111 times [2022-01-28 14:52:24,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:24,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456706341] [2022-01-28 14:52:24,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:24,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:52:24,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:24,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456706341] [2022-01-28 14:52:24,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456706341] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:24,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490063049] [2022-01-28 14:52:24,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:52:24,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:24,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:24,168 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:24,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-28 14:52:24,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:52:24,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:24,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:52:24,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:24,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:52:24,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-28 14:52:24,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-01-28 14:52:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:52:24,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:24,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:24,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 99 [2022-01-28 14:52:25,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:25,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-01-28 14:52:25,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:25,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-01-28 14:52:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:52:25,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490063049] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:25,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:25,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:52:25,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564639967] [2022-01-28 14:52:25,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:25,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:52:25,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:25,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:52:25,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:52:25,123 INFO L87 Difference]: Start difference. First operand 1383 states and 4584 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:25,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:25,542 INFO L93 Difference]: Finished difference Result 1483 states and 4839 transitions. [2022-01-28 14:52:25,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:52:25,543 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:25,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:25,545 INFO L225 Difference]: With dead ends: 1483 [2022-01-28 14:52:25,545 INFO L226 Difference]: Without dead ends: 1444 [2022-01-28 14:52:25,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:25,546 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:25,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 256 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:52:25,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2022-01-28 14:52:25,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1379. [2022-01-28 14:52:25,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 3.3193033381712627) internal successors, (4574), 1378 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:25,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 4574 transitions. [2022-01-28 14:52:25,563 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 4574 transitions. Word has length 24 [2022-01-28 14:52:25,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:25,563 INFO L470 AbstractCegarLoop]: Abstraction has 1379 states and 4574 transitions. [2022-01-28 14:52:25,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:25,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 4574 transitions. [2022-01-28 14:52:25,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:25,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:25,565 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:25,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-01-28 14:52:25,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-01-28 14:52:25,774 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:25,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:25,775 INFO L85 PathProgramCache]: Analyzing trace with hash 630291485, now seen corresponding path program 112 times [2022-01-28 14:52:25,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:25,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246858306] [2022-01-28 14:52:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:25,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:25,919 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:25,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:25,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246858306] [2022-01-28 14:52:25,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246858306] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:25,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695481442] [2022-01-28 14:52:25,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:52:25,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:25,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:25,921 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:25,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-28 14:52:25,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:52:25,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:25,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:52:25,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:25,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:25,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:52:26,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:52:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:26,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:26,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:26,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-01-28 14:52:26,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:26,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:52:26,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:26,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:52:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:26,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695481442] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:26,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:26,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-01-28 14:52:26,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501650253] [2022-01-28 14:52:26,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:26,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:52:26,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:26,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:52:26,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:52:26,785 INFO L87 Difference]: Start difference. First operand 1379 states and 4574 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:27,285 INFO L93 Difference]: Finished difference Result 1749 states and 5646 transitions. [2022-01-28 14:52:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:52:27,286 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:27,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:27,289 INFO L225 Difference]: With dead ends: 1749 [2022-01-28 14:52:27,289 INFO L226 Difference]: Without dead ends: 1676 [2022-01-28 14:52:27,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:52:27,289 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 136 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:27,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 329 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 883 Invalid, 0 Unknown, 197 Unchecked, 0.3s Time] [2022-01-28 14:52:27,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2022-01-28 14:52:27,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1399. [2022-01-28 14:52:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.3104434907010014) internal successors, (4628), 1398 states have internal predecessors, (4628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:27,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4628 transitions. [2022-01-28 14:52:27,307 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4628 transitions. Word has length 24 [2022-01-28 14:52:27,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:27,307 INFO L470 AbstractCegarLoop]: Abstraction has 1399 states and 4628 transitions. [2022-01-28 14:52:27,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:27,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4628 transitions. [2022-01-28 14:52:27,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:27,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:27,309 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:27,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-01-28 14:52:27,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-01-28 14:52:27,515 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:27,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:27,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1471968733, now seen corresponding path program 113 times [2022-01-28 14:52:27,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:27,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924136036] [2022-01-28 14:52:27,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:27,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:27,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:27,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924136036] [2022-01-28 14:52:27,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924136036] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:27,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782025239] [2022-01-28 14:52:27,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:52:27,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:27,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:27,665 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:27,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-28 14:52:27,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:52:27,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:27,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:52:27,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:27,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:27,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:52:27,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:27,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:27,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:52:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:28,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:28,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:28,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-01-28 14:52:28,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:28,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:52:28,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:28,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:52:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:28,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782025239] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:28,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:28,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:52:28,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481775039] [2022-01-28 14:52:28,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:28,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:52:28,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:28,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:52:28,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:28,562 INFO L87 Difference]: Start difference. First operand 1399 states and 4628 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:29,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:29,113 INFO L93 Difference]: Finished difference Result 1766 states and 5716 transitions. [2022-01-28 14:52:29,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:52:29,113 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:29,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:29,116 INFO L225 Difference]: With dead ends: 1766 [2022-01-28 14:52:29,116 INFO L226 Difference]: Without dead ends: 1680 [2022-01-28 14:52:29,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:52:29,116 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 189 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:29,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 261 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 533 Invalid, 0 Unknown, 261 Unchecked, 0.2s Time] [2022-01-28 14:52:29,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2022-01-28 14:52:29,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1399. [2022-01-28 14:52:29,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.3104434907010014) internal successors, (4628), 1398 states have internal predecessors, (4628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4628 transitions. [2022-01-28 14:52:29,134 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4628 transitions. Word has length 24 [2022-01-28 14:52:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:29,134 INFO L470 AbstractCegarLoop]: Abstraction has 1399 states and 4628 transitions. [2022-01-28 14:52:29,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:29,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4628 transitions. [2022-01-28 14:52:29,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:29,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:29,136 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:29,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:29,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:29,338 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:29,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:29,338 INFO L85 PathProgramCache]: Analyzing trace with hash -308035559, now seen corresponding path program 114 times [2022-01-28 14:52:29,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:29,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294432375] [2022-01-28 14:52:29,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:29,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:29,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:29,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294432375] [2022-01-28 14:52:29,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294432375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:29,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608996252] [2022-01-28 14:52:29,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:52:29,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:29,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:29,491 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:29,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-28 14:52:29,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:52:29,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:29,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:52:29,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:29,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:29,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:52:29,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:29,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:52:29,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:52:29,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:52:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:29,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:30,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:30,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-01-28 14:52:30,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:30,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:52:30,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:30,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:52:30,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:30,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608996252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:30,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:30,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:52:30,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361877201] [2022-01-28 14:52:30,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:30,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:52:30,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:30,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:52:30,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:52:30,488 INFO L87 Difference]: Start difference. First operand 1399 states and 4628 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:31,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:31,933 INFO L93 Difference]: Finished difference Result 2092 states and 6452 transitions. [2022-01-28 14:52:31,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-28 14:52:31,933 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:31,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:31,937 INFO L225 Difference]: With dead ends: 2092 [2022-01-28 14:52:31,937 INFO L226 Difference]: Without dead ends: 1942 [2022-01-28 14:52:31,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=221, Invalid=1339, Unknown=0, NotChecked=0, Total=1560 [2022-01-28 14:52:31,937 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 216 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:31,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 460 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1200 Invalid, 0 Unknown, 167 Unchecked, 0.5s Time] [2022-01-28 14:52:31,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2022-01-28 14:52:31,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1401. [2022-01-28 14:52:31,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 3.3107142857142855) internal successors, (4635), 1400 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:31,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 4635 transitions. [2022-01-28 14:52:31,957 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 4635 transitions. Word has length 24 [2022-01-28 14:52:31,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:31,957 INFO L470 AbstractCegarLoop]: Abstraction has 1401 states and 4635 transitions. [2022-01-28 14:52:31,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:31,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 4635 transitions. [2022-01-28 14:52:31,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:31,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:31,959 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:31,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:32,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:32,160 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:32,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1605433057, now seen corresponding path program 115 times [2022-01-28 14:52:32,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:32,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734394420] [2022-01-28 14:52:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:32,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:32,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:32,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734394420] [2022-01-28 14:52:32,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734394420] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:32,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874576426] [2022-01-28 14:52:32,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:52:32,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:32,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:32,309 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:32,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-28 14:52:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:32,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:52:32,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:32,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:32,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:52:32,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:52:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:32,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:33,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:33,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-01-28 14:52:33,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:33,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:52:33,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:33,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:52:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:33,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874576426] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:33,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:33,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-01-28 14:52:33,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229019034] [2022-01-28 14:52:33,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:33,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:52:33,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:33,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:52:33,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:52:33,180 INFO L87 Difference]: Start difference. First operand 1401 states and 4635 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:33,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:33,618 INFO L93 Difference]: Finished difference Result 1707 states and 5587 transitions. [2022-01-28 14:52:33,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:52:33,618 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:33,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:33,621 INFO L225 Difference]: With dead ends: 1707 [2022-01-28 14:52:33,621 INFO L226 Difference]: Without dead ends: 1634 [2022-01-28 14:52:33,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:33,621 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 105 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:33,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 357 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 871 Invalid, 0 Unknown, 195 Unchecked, 0.3s Time] [2022-01-28 14:52:33,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2022-01-28 14:52:33,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1408. [2022-01-28 14:52:33,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 3.3091684434968016) internal successors, (4656), 1407 states have internal predecessors, (4656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 4656 transitions. [2022-01-28 14:52:33,639 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 4656 transitions. Word has length 24 [2022-01-28 14:52:33,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:33,639 INFO L470 AbstractCegarLoop]: Abstraction has 1408 states and 4656 transitions. [2022-01-28 14:52:33,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:33,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 4656 transitions. [2022-01-28 14:52:33,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:33,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:33,641 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:33,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-01-28 14:52:33,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:33,841 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:33,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:33,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1312087331, now seen corresponding path program 116 times [2022-01-28 14:52:33,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:33,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908723767] [2022-01-28 14:52:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:33,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:33,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:33,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908723767] [2022-01-28 14:52:33,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908723767] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:33,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855812502] [2022-01-28 14:52:33,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:52:33,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:33,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:33,948 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:33,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-28 14:52:33,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:52:33,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:33,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:52:33,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:34,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:52:34,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:52:34,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:52:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:34,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:34,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:34,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-01-28 14:52:34,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:34,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:52:34,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:34,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:52:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:34,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855812502] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:34,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:34,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:52:34,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034396203] [2022-01-28 14:52:34,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:34,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:52:34,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:34,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:52:34,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:34,841 INFO L87 Difference]: Start difference. First operand 1408 states and 4656 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:35,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:35,778 INFO L93 Difference]: Finished difference Result 2247 states and 7073 transitions. [2022-01-28 14:52:35,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-28 14:52:35,779 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:35,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:35,790 INFO L225 Difference]: With dead ends: 2247 [2022-01-28 14:52:35,790 INFO L226 Difference]: Without dead ends: 2084 [2022-01-28 14:52:35,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 14:52:35,790 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 276 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:35,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 277 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:52:35,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2022-01-28 14:52:35,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1417. [2022-01-28 14:52:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1416 states have (on average 3.312853107344633) internal successors, (4691), 1416 states have internal predecessors, (4691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 4691 transitions. [2022-01-28 14:52:35,810 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 4691 transitions. Word has length 24 [2022-01-28 14:52:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:35,810 INFO L470 AbstractCegarLoop]: Abstraction has 1417 states and 4691 transitions. [2022-01-28 14:52:35,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 4691 transitions. [2022-01-28 14:52:35,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:35,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:35,812 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:35,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:36,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:36,012 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:36,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:36,013 INFO L85 PathProgramCache]: Analyzing trace with hash -959553497, now seen corresponding path program 117 times [2022-01-28 14:52:36,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:36,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012286453] [2022-01-28 14:52:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:36,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:36,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:36,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012286453] [2022-01-28 14:52:36,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012286453] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:36,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854713220] [2022-01-28 14:52:36,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:52:36,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:36,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:36,187 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:36,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-28 14:52:36,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:52:36,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:36,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:52:36,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:36,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:36,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:52:36,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:36,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:36,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:36,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:52:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:36,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:37,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:37,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2022-01-28 14:52:37,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:37,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:52:37,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:37,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:52:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:37,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854713220] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:37,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:37,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:52:37,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466259393] [2022-01-28 14:52:37,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:37,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:52:37,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:37,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:52:37,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:37,681 INFO L87 Difference]: Start difference. First operand 1417 states and 4691 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:37,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:37,852 INFO L93 Difference]: Finished difference Result 1520 states and 4999 transitions. [2022-01-28 14:52:37,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:52:37,852 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:37,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:37,855 INFO L225 Difference]: With dead ends: 1520 [2022-01-28 14:52:37,855 INFO L226 Difference]: Without dead ends: 1489 [2022-01-28 14:52:37,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:37,855 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 49 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:37,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 221 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 376 Invalid, 0 Unknown, 178 Unchecked, 0.2s Time] [2022-01-28 14:52:37,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2022-01-28 14:52:37,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1418. [2022-01-28 14:52:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 3.31333803810868) internal successors, (4695), 1417 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:37,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 4695 transitions. [2022-01-28 14:52:37,872 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 4695 transitions. Word has length 24 [2022-01-28 14:52:37,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:37,872 INFO L470 AbstractCegarLoop]: Abstraction has 1418 states and 4695 transitions. [2022-01-28 14:52:37,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:37,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 4695 transitions. [2022-01-28 14:52:37,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:37,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:37,874 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:37,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:38,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:38,075 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:38,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:38,075 INFO L85 PathProgramCache]: Analyzing trace with hash 204379677, now seen corresponding path program 118 times [2022-01-28 14:52:38,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:38,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699407388] [2022-01-28 14:52:38,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:38,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:38,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:38,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699407388] [2022-01-28 14:52:38,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699407388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:38,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765989064] [2022-01-28 14:52:38,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:52:38,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:38,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:38,241 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:38,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-28 14:52:38,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:52:38,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:38,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:52:38,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:38,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:52:38,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:52:38,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:52:38,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:52:38,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:38,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:39,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:39,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-01-28 14:52:39,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:39,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:52:39,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:39,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:52:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:39,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765989064] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:39,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:39,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:52:39,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283076075] [2022-01-28 14:52:39,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:39,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:52:39,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:39,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:52:39,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:39,234 INFO L87 Difference]: Start difference. First operand 1418 states and 4695 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:41,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:41,484 INFO L93 Difference]: Finished difference Result 2744 states and 8248 transitions. [2022-01-28 14:52:41,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-28 14:52:41,484 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:41,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:41,488 INFO L225 Difference]: With dead ends: 2744 [2022-01-28 14:52:41,489 INFO L226 Difference]: Without dead ends: 2532 [2022-01-28 14:52:41,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=383, Invalid=2167, Unknown=0, NotChecked=0, Total=2550 [2022-01-28 14:52:41,489 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 253 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:41,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 560 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 14:52:41,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2022-01-28 14:52:41,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1439. [2022-01-28 14:52:41,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 3.321974965229485) internal successors, (4777), 1438 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 4777 transitions. [2022-01-28 14:52:41,513 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 4777 transitions. Word has length 24 [2022-01-28 14:52:41,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:41,513 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 4777 transitions. [2022-01-28 14:52:41,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:41,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 4777 transitions. [2022-01-28 14:52:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:41,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:41,515 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:41,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:41,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-01-28 14:52:41,719 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:41,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:41,720 INFO L85 PathProgramCache]: Analyzing trace with hash -651002653, now seen corresponding path program 119 times [2022-01-28 14:52:41,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:41,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178192051] [2022-01-28 14:52:41,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:41,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:41,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:41,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178192051] [2022-01-28 14:52:41,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178192051] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:41,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473987953] [2022-01-28 14:52:41,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:52:41,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:41,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:41,923 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:41,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-28 14:52:41,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:52:41,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:41,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:52:41,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:41,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:52:42,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:42,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:52:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:42,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:42,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:42,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-01-28 14:52:42,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:42,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:52:42,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:42,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:52:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:42,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473987953] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:42,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:42,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:52:42,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302631380] [2022-01-28 14:52:42,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:42,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:52:42,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:42,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:52:42,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:42,706 INFO L87 Difference]: Start difference. First operand 1439 states and 4777 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:44,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:44,000 INFO L93 Difference]: Finished difference Result 2045 states and 6490 transitions. [2022-01-28 14:52:44,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:52:44,000 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:44,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:44,004 INFO L225 Difference]: With dead ends: 2045 [2022-01-28 14:52:44,004 INFO L226 Difference]: Without dead ends: 1924 [2022-01-28 14:52:44,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 14:52:44,004 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 147 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:44,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 355 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:52:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2022-01-28 14:52:44,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1429. [2022-01-28 14:52:44,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.316526610644258) internal successors, (4736), 1428 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 4736 transitions. [2022-01-28 14:52:44,024 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 4736 transitions. Word has length 24 [2022-01-28 14:52:44,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:44,024 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 4736 transitions. [2022-01-28 14:52:44,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:44,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 4736 transitions. [2022-01-28 14:52:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:44,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:44,025 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:44,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:44,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-01-28 14:52:44,226 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:44,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:44,226 INFO L85 PathProgramCache]: Analyzing trace with hash -676389503, now seen corresponding path program 120 times [2022-01-28 14:52:44,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:44,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984454459] [2022-01-28 14:52:44,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:44,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:44,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:44,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984454459] [2022-01-28 14:52:44,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984454459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:44,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219068901] [2022-01-28 14:52:44,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:52:44,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:44,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:44,374 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:44,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-28 14:52:44,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:52:44,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:44,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:52:44,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:44,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:52:44,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:52:44,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:52:44,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:52:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:44,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:45,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:45,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 55 [2022-01-28 14:52:45,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:45,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:52:45,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:45,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:52:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:45,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219068901] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:45,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:45,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:52:45,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629854162] [2022-01-28 14:52:45,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:45,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:52:45,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:45,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:52:45,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:45,385 INFO L87 Difference]: Start difference. First operand 1429 states and 4736 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:50,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:50,773 INFO L93 Difference]: Finished difference Result 3304 states and 9565 transitions. [2022-01-28 14:52:50,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-28 14:52:50,774 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:50,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:50,778 INFO L225 Difference]: With dead ends: 3304 [2022-01-28 14:52:50,779 INFO L226 Difference]: Without dead ends: 2870 [2022-01-28 14:52:50,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=903, Invalid=4353, Unknown=0, NotChecked=0, Total=5256 [2022-01-28 14:52:50,779 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 329 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:50,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 507 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1417 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 14:52:50,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2022-01-28 14:52:50,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 1454. [2022-01-28 14:52:50,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 3.3358568479008945) internal successors, (4847), 1453 states have internal predecessors, (4847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:50,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 4847 transitions. [2022-01-28 14:52:50,807 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 4847 transitions. Word has length 24 [2022-01-28 14:52:50,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:50,807 INFO L470 AbstractCegarLoop]: Abstraction has 1454 states and 4847 transitions. [2022-01-28 14:52:50,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:50,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 4847 transitions. [2022-01-28 14:52:50,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:50,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:50,809 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:50,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-01-28 14:52:51,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-28 14:52:51,009 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:51,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:51,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1723617635, now seen corresponding path program 121 times [2022-01-28 14:52:51,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:51,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631236665] [2022-01-28 14:52:51,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:51,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:52:51,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:51,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631236665] [2022-01-28 14:52:51,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631236665] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:51,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136043168] [2022-01-28 14:52:51,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:52:51,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:51,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:51,154 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:51,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-28 14:52:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:51,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:52:51,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:51,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:52:51,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:52:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:52:51,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:51,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:51,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-01-28 14:52:51,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:51,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:52:51,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:51,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:52:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:52:51,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136043168] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:51,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:51,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-01-28 14:52:51,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310743155] [2022-01-28 14:52:51,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:51,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:52:51,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:51,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:52:51,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:52:51,866 INFO L87 Difference]: Start difference. First operand 1454 states and 4847 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:52,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:52,803 INFO L93 Difference]: Finished difference Result 1966 states and 6278 transitions. [2022-01-28 14:52:52,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:52:52,803 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:52,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:52,807 INFO L225 Difference]: With dead ends: 1966 [2022-01-28 14:52:52,807 INFO L226 Difference]: Without dead ends: 1839 [2022-01-28 14:52:52,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:52:52,807 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 197 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:52,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 223 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:52:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2022-01-28 14:52:52,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1441. [2022-01-28 14:52:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 3.3375) internal successors, (4806), 1440 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:52,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 4806 transitions. [2022-01-28 14:52:52,827 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 4806 transitions. Word has length 24 [2022-01-28 14:52:52,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:52,827 INFO L470 AbstractCegarLoop]: Abstraction has 1441 states and 4806 transitions. [2022-01-28 14:52:52,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:52,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 4806 transitions. [2022-01-28 14:52:52,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:52,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:52,829 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:52,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-01-28 14:52:53,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-01-28 14:52:53,030 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:53,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:53,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1582657373, now seen corresponding path program 122 times [2022-01-28 14:52:53,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:53,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895996149] [2022-01-28 14:52:53,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:53,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:53,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:53,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895996149] [2022-01-28 14:52:53,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895996149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:53,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224158120] [2022-01-28 14:52:53,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:52:53,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:53,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:53,134 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:53,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-28 14:52:53,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:52:53,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:53,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:52:53,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:53,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:52:53,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:52:53,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:52:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:53,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:53,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:53,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:52:53,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:53,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:52:53,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:53,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:52:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:53,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224158120] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:53,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:53,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:52:53,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917912777] [2022-01-28 14:52:53,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:53,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:53,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:53,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:53,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:53,849 INFO L87 Difference]: Start difference. First operand 1441 states and 4806 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:54,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:54,333 INFO L93 Difference]: Finished difference Result 1661 states and 5441 transitions. [2022-01-28 14:52:54,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:52:54,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:54,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:54,336 INFO L225 Difference]: With dead ends: 1661 [2022-01-28 14:52:54,336 INFO L226 Difference]: Without dead ends: 1571 [2022-01-28 14:52:54,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:52:54,337 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 104 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:54,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 242 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:52:54,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2022-01-28 14:52:54,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1455. [2022-01-28 14:52:54,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1454 states have (on average 3.3342503438789546) internal successors, (4848), 1454 states have internal predecessors, (4848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 4848 transitions. [2022-01-28 14:52:54,353 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 4848 transitions. Word has length 24 [2022-01-28 14:52:54,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:54,353 INFO L470 AbstractCegarLoop]: Abstraction has 1455 states and 4848 transitions. [2022-01-28 14:52:54,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:54,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 4848 transitions. [2022-01-28 14:52:54,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:54,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:54,355 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:54,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-01-28 14:52:54,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:54,556 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:54,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:54,556 INFO L85 PathProgramCache]: Analyzing trace with hash 496636455, now seen corresponding path program 123 times [2022-01-28 14:52:54,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:54,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276986876] [2022-01-28 14:52:54,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:54,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:54,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:54,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276986876] [2022-01-28 14:52:54,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276986876] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:54,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623204100] [2022-01-28 14:52:54,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:52:54,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:54,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:54,685 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:54,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-28 14:52:54,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:52:54,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:54,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:52:54,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:54,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:52:54,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:52:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:54,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:55,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:55,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2022-01-28 14:52:55,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:55,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:52:55,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:55,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:52:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:55,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623204100] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:55,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:55,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:52:55,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815245209] [2022-01-28 14:52:55,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:55,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:55,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:55,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:55,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:55,558 INFO L87 Difference]: Start difference. First operand 1455 states and 4848 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:56,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:56,510 INFO L93 Difference]: Finished difference Result 1863 states and 5937 transitions. [2022-01-28 14:52:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:52:56,510 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:56,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:56,513 INFO L225 Difference]: With dead ends: 1863 [2022-01-28 14:52:56,513 INFO L226 Difference]: Without dead ends: 1741 [2022-01-28 14:52:56,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:52:56,514 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 114 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:56,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 355 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:52:56,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2022-01-28 14:52:56,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1456. [2022-01-28 14:52:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.334707903780069) internal successors, (4852), 1455 states have internal predecessors, (4852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:56,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 4852 transitions. [2022-01-28 14:52:56,532 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 4852 transitions. Word has length 24 [2022-01-28 14:52:56,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:56,532 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 4852 transitions. [2022-01-28 14:52:56,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:56,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 4852 transitions. [2022-01-28 14:52:56,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:56,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:56,534 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:56,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-01-28 14:52:56,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:56,734 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:56,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:56,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1652160081, now seen corresponding path program 124 times [2022-01-28 14:52:56,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:56,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548114085] [2022-01-28 14:52:56,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:56,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:56,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:56,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548114085] [2022-01-28 14:52:56,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548114085] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:56,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450979288] [2022-01-28 14:52:56,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:52:56,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:56,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:56,835 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:56,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-28 14:52:56,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:52:56,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:56,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:52:56,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:56,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:52:56,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:52:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:57,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:57,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:57,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 107 [2022-01-28 14:52:57,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:57,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:52:57,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:57,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:52:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:57,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450979288] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:57,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:57,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-01-28 14:52:57,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439998001] [2022-01-28 14:52:57,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:57,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:52:57,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:57,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:52:57,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:52:57,657 INFO L87 Difference]: Start difference. First operand 1456 states and 4852 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:57,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:57,929 INFO L93 Difference]: Finished difference Result 1628 states and 5335 transitions. [2022-01-28 14:52:57,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:52:57,930 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:57,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:57,932 INFO L225 Difference]: With dead ends: 1628 [2022-01-28 14:52:57,932 INFO L226 Difference]: Without dead ends: 1566 [2022-01-28 14:52:57,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:52:57,933 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:57,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 159 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:52:57,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2022-01-28 14:52:57,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1456. [2022-01-28 14:52:57,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.334707903780069) internal successors, (4852), 1455 states have internal predecessors, (4852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 4852 transitions. [2022-01-28 14:52:57,949 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 4852 transitions. Word has length 24 [2022-01-28 14:52:57,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:57,950 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 4852 transitions. [2022-01-28 14:52:57,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:57,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 4852 transitions. [2022-01-28 14:52:57,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:57,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:57,951 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:57,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:58,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-01-28 14:52:58,167 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:58,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:58,167 INFO L85 PathProgramCache]: Analyzing trace with hash 257836915, now seen corresponding path program 125 times [2022-01-28 14:52:58,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:58,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950868854] [2022-01-28 14:52:58,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:58,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:58,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:58,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950868854] [2022-01-28 14:52:58,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950868854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:58,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205123001] [2022-01-28 14:52:58,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:52:58,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:58,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:58,321 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:52:58,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-28 14:52:58,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:52:58,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:58,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:52:58,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:58,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:52:58,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:58,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:52:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:58,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:58,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:58,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2022-01-28 14:52:59,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:59,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:52:59,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:59,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:52:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:52:59,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205123001] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:59,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:59,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:52:59,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597279237] [2022-01-28 14:52:59,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:59,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:52:59,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:59,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:52:59,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:59,135 INFO L87 Difference]: Start difference. First operand 1456 states and 4852 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:59,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:59,954 INFO L93 Difference]: Finished difference Result 1751 states and 5711 transitions. [2022-01-28 14:52:59,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:52:59,955 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:52:59,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:59,958 INFO L225 Difference]: With dead ends: 1751 [2022-01-28 14:52:59,958 INFO L226 Difference]: Without dead ends: 1665 [2022-01-28 14:52:59,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 14:52:59,958 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:59,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 240 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:52:59,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2022-01-28 14:52:59,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1478. [2022-01-28 14:52:59,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 3.3310765064319567) internal successors, (4920), 1477 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:59,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 4920 transitions. [2022-01-28 14:52:59,976 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 4920 transitions. Word has length 24 [2022-01-28 14:52:59,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:59,976 INFO L470 AbstractCegarLoop]: Abstraction has 1478 states and 4920 transitions. [2022-01-28 14:52:59,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:59,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 4920 transitions. [2022-01-28 14:52:59,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:52:59,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:59,978 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:59,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-01-28 14:53:00,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:00,178 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:00,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:00,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1421770089, now seen corresponding path program 126 times [2022-01-28 14:53:00,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:00,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417462292] [2022-01-28 14:53:00,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:00,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:00,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:00,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417462292] [2022-01-28 14:53:00,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417462292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:00,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970662939] [2022-01-28 14:53:00,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:53:00,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:00,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:00,342 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:00,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-28 14:53:00,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:53:00,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:00,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:53:00,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:00,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:00,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:53:00,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:00,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:53:00,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:00,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:53:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:01,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:01,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:01,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2022-01-28 14:53:01,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:01,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:53:01,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:01,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:53:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:01,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970662939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:01,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:01,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:53:01,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333433351] [2022-01-28 14:53:01,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:01,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:53:01,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:01,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:53:01,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:53:01,696 INFO L87 Difference]: Start difference. First operand 1478 states and 4920 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:02,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:02,666 INFO L93 Difference]: Finished difference Result 1832 states and 5765 transitions. [2022-01-28 14:53:02,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:53:02,666 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:02,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:02,669 INFO L225 Difference]: With dead ends: 1832 [2022-01-28 14:53:02,669 INFO L226 Difference]: Without dead ends: 1721 [2022-01-28 14:53:02,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:53:02,670 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 152 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:02,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 372 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 969 Invalid, 0 Unknown, 161 Unchecked, 0.4s Time] [2022-01-28 14:53:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-01-28 14:53:02,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1478. [2022-01-28 14:53:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 3.3310765064319567) internal successors, (4920), 1477 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:02,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 4920 transitions. [2022-01-28 14:53:02,690 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 4920 transitions. Word has length 24 [2022-01-28 14:53:02,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:02,690 INFO L470 AbstractCegarLoop]: Abstraction has 1478 states and 4920 transitions. [2022-01-28 14:53:02,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:02,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 4920 transitions. [2022-01-28 14:53:02,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:02,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:02,692 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:02,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-01-28 14:53:02,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:02,892 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:02,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:02,892 INFO L85 PathProgramCache]: Analyzing trace with hash 347156531, now seen corresponding path program 127 times [2022-01-28 14:53:02,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:02,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106867786] [2022-01-28 14:53:02,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:02,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:03,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:03,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106867786] [2022-01-28 14:53:03,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106867786] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:03,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223329891] [2022-01-28 14:53:03,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:53:03,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:03,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:03,063 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:03,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-28 14:53:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:03,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:53:03,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:03,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:53:03,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:03,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:03,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:03,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:53:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:03,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:04,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:04,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:53:04,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:04,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:53:04,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:04,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:53:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:04,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223329891] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:04,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:04,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:53:04,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858584938] [2022-01-28 14:53:04,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:04,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:04,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:04,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:04,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:04,266 INFO L87 Difference]: Start difference. First operand 1478 states and 4920 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:04,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:04,566 INFO L93 Difference]: Finished difference Result 1689 states and 5550 transitions. [2022-01-28 14:53:04,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:53:04,566 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:04,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:04,569 INFO L225 Difference]: With dead ends: 1689 [2022-01-28 14:53:04,569 INFO L226 Difference]: Without dead ends: 1631 [2022-01-28 14:53:04,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:53:04,569 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 100 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:04,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 183 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 506 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2022-01-28 14:53:04,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2022-01-28 14:53:04,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1475. [2022-01-28 14:53:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1474 states have (on average 3.3290366350067844) internal successors, (4907), 1474 states have internal predecessors, (4907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 4907 transitions. [2022-01-28 14:53:04,586 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 4907 transitions. Word has length 24 [2022-01-28 14:53:04,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:04,586 INFO L470 AbstractCegarLoop]: Abstraction has 1475 states and 4907 transitions. [2022-01-28 14:53:04,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 4907 transitions. [2022-01-28 14:53:04,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:04,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:04,588 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:04,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:04,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:04,789 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:04,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:04,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1705443173, now seen corresponding path program 128 times [2022-01-28 14:53:04,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:04,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645881711] [2022-01-28 14:53:04,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:04,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:04,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:04,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645881711] [2022-01-28 14:53:04,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645881711] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:04,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954093246] [2022-01-28 14:53:04,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:53:04,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:04,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:04,974 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:04,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-28 14:53:05,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:05,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:05,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:53:05,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:05,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:05,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:53:05,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:05,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:53:05,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:05,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:53:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:05,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:06,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:06,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2022-01-28 14:53:06,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:06,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:53:06,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:06,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:53:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:06,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954093246] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:06,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:06,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:53:06,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803343172] [2022-01-28 14:53:06,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:06,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:53:06,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:06,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:53:06,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:06,270 INFO L87 Difference]: Start difference. First operand 1475 states and 4907 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:08,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:08,220 INFO L93 Difference]: Finished difference Result 2339 states and 7096 transitions. [2022-01-28 14:53:08,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-28 14:53:08,220 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:08,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:08,224 INFO L225 Difference]: With dead ends: 2339 [2022-01-28 14:53:08,224 INFO L226 Difference]: Without dead ends: 2135 [2022-01-28 14:53:08,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=291, Invalid=1601, Unknown=0, NotChecked=0, Total=1892 [2022-01-28 14:53:08,224 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 300 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:08,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 350 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 951 Invalid, 0 Unknown, 36 Unchecked, 0.4s Time] [2022-01-28 14:53:08,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2022-01-28 14:53:08,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1476. [2022-01-28 14:53:08,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.3301694915254236) internal successors, (4912), 1475 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 4912 transitions. [2022-01-28 14:53:08,248 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 4912 transitions. Word has length 24 [2022-01-28 14:53:08,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:08,248 INFO L470 AbstractCegarLoop]: Abstraction has 1476 states and 4912 transitions. [2022-01-28 14:53:08,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:08,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 4912 transitions. [2022-01-28 14:53:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:08,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:08,250 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:08,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:08,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:08,450 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:08,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:08,450 INFO L85 PathProgramCache]: Analyzing trace with hash -2084066715, now seen corresponding path program 129 times [2022-01-28 14:53:08,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:08,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632734653] [2022-01-28 14:53:08,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:08,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:08,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:08,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632734653] [2022-01-28 14:53:08,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632734653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:08,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637947441] [2022-01-28 14:53:08,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:53:08,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:08,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:08,672 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:08,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-28 14:53:08,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:53:08,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:08,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:53:08,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:08,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:53:08,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:08,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:53:08,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:08,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:53:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:09,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:09,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:09,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 107 [2022-01-28 14:53:09,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:09,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:53:09,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:09,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:53:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:09,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637947441] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:09,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:09,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:53:09,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677200420] [2022-01-28 14:53:09,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:09,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:53:09,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:09,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:53:09,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:09,936 INFO L87 Difference]: Start difference. First operand 1476 states and 4912 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:10,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:10,893 INFO L93 Difference]: Finished difference Result 1866 states and 5966 transitions. [2022-01-28 14:53:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:53:10,894 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:10,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:10,897 INFO L225 Difference]: With dead ends: 1866 [2022-01-28 14:53:10,897 INFO L226 Difference]: Without dead ends: 1781 [2022-01-28 14:53:10,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:53:10,897 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 128 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:10,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 354 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1023 Invalid, 0 Unknown, 71 Unchecked, 0.4s Time] [2022-01-28 14:53:10,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2022-01-28 14:53:10,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1487. [2022-01-28 14:53:10,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.3364737550471064) internal successors, (4958), 1486 states have internal predecessors, (4958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:10,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4958 transitions. [2022-01-28 14:53:10,917 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4958 transitions. Word has length 24 [2022-01-28 14:53:10,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:10,917 INFO L470 AbstractCegarLoop]: Abstraction has 1487 states and 4958 transitions. [2022-01-28 14:53:10,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:10,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4958 transitions. [2022-01-28 14:53:10,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:10,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:10,919 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:10,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:11,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-01-28 14:53:11,119 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:11,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:11,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1098593955, now seen corresponding path program 130 times [2022-01-28 14:53:11,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:11,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865301992] [2022-01-28 14:53:11,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:11,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:11,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:11,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865301992] [2022-01-28 14:53:11,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865301992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:11,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342249253] [2022-01-28 14:53:11,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:53:11,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:11,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:11,281 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:11,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-28 14:53:11,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:53:11,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:11,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:53:11,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:11,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:53:11,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:53:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:11,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:12,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:12,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:53:12,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:12,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:53:12,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:12,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:53:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:12,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342249253] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:12,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:12,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:53:12,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875739800] [2022-01-28 14:53:12,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:12,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:53:12,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:12,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:53:12,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:53:12,242 INFO L87 Difference]: Start difference. First operand 1487 states and 4958 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:12,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:12,682 INFO L93 Difference]: Finished difference Result 1803 states and 5859 transitions. [2022-01-28 14:53:12,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:53:12,682 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:12,685 INFO L225 Difference]: With dead ends: 1803 [2022-01-28 14:53:12,685 INFO L226 Difference]: Without dead ends: 1689 [2022-01-28 14:53:12,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:53:12,685 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:12,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 245 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:53:12,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2022-01-28 14:53:12,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1485. [2022-01-28 14:53:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 3.339622641509434) internal successors, (4956), 1484 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:12,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 4956 transitions. [2022-01-28 14:53:12,703 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 4956 transitions. Word has length 24 [2022-01-28 14:53:12,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:12,703 INFO L470 AbstractCegarLoop]: Abstraction has 1485 states and 4956 transitions. [2022-01-28 14:53:12,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:12,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 4956 transitions. [2022-01-28 14:53:12,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:12,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:12,705 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:12,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-01-28 14:53:12,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-01-28 14:53:12,905 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:12,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:12,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1782179871, now seen corresponding path program 131 times [2022-01-28 14:53:12,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:12,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664110067] [2022-01-28 14:53:12,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:12,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:13,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:13,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664110067] [2022-01-28 14:53:13,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664110067] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:13,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125700017] [2022-01-28 14:53:13,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:53:13,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:13,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:13,061 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:13,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-28 14:53:13,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:53:13,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:13,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:53:13,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:13,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:53:13,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:13,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:13,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:13,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:53:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:13,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:13,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:13,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:53:14,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:14,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:53:14,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:14,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:53:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:14,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125700017] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:14,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:14,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:53:14,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223748142] [2022-01-28 14:53:14,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:14,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:53:14,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:14,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:53:14,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:53:14,053 INFO L87 Difference]: Start difference. First operand 1485 states and 4956 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:14,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:14,347 INFO L93 Difference]: Finished difference Result 1660 states and 5470 transitions. [2022-01-28 14:53:14,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:53:14,347 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:14,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:14,350 INFO L225 Difference]: With dead ends: 1660 [2022-01-28 14:53:14,350 INFO L226 Difference]: Without dead ends: 1629 [2022-01-28 14:53:14,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:53:14,350 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 66 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:14,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 197 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 636 Invalid, 0 Unknown, 112 Unchecked, 0.2s Time] [2022-01-28 14:53:14,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2022-01-28 14:53:14,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1466. [2022-01-28 14:53:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 3.333788395904437) internal successors, (4884), 1465 states have internal predecessors, (4884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:14,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 4884 transitions. [2022-01-28 14:53:14,368 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 4884 transitions. Word has length 24 [2022-01-28 14:53:14,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:14,368 INFO L470 AbstractCegarLoop]: Abstraction has 1466 states and 4884 transitions. [2022-01-28 14:53:14,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:14,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 4884 transitions. [2022-01-28 14:53:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:14,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:14,370 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:14,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-01-28 14:53:14,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-01-28 14:53:14,570 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:14,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:14,570 INFO L85 PathProgramCache]: Analyzing trace with hash -873204247, now seen corresponding path program 132 times [2022-01-28 14:53:14,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:14,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233317390] [2022-01-28 14:53:14,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:14,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:14,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:14,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233317390] [2022-01-28 14:53:14,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233317390] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:14,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286427301] [2022-01-28 14:53:14,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:53:14,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:14,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:14,734 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:14,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-28 14:53:14,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:53:14,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:14,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:53:14,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:14,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:53:14,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:14,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:53:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:14,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:15,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:15,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:53:15,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:15,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:53:15,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:15,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:53:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:15,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286427301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:15,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:15,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:53:15,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082433678] [2022-01-28 14:53:15,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:15,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:15,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:15,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:15,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:15,487 INFO L87 Difference]: Start difference. First operand 1466 states and 4884 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:15,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:15,969 INFO L93 Difference]: Finished difference Result 1813 states and 5852 transitions. [2022-01-28 14:53:15,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:53:15,969 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:15,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:15,980 INFO L225 Difference]: With dead ends: 1813 [2022-01-28 14:53:15,980 INFO L226 Difference]: Without dead ends: 1723 [2022-01-28 14:53:15,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:53:15,980 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 93 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:15,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 271 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:53:15,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2022-01-28 14:53:15,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1479. [2022-01-28 14:53:15,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1479 states, 1478 states have (on average 3.335588633288227) internal successors, (4930), 1478 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:15,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 4930 transitions. [2022-01-28 14:53:15,998 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 4930 transitions. Word has length 24 [2022-01-28 14:53:15,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:15,998 INFO L470 AbstractCegarLoop]: Abstraction has 1479 states and 4930 transitions. [2022-01-28 14:53:15,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:15,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 4930 transitions. [2022-01-28 14:53:16,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:16,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:16,000 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:16,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-01-28 14:53:16,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-01-28 14:53:16,200 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:16,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:16,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1454965027, now seen corresponding path program 133 times [2022-01-28 14:53:16,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:16,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75468379] [2022-01-28 14:53:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:16,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:16,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:16,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75468379] [2022-01-28 14:53:16,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75468379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:16,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024854694] [2022-01-28 14:53:16,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:53:16,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:16,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:16,403 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:16,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-28 14:53:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:16,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:53:16,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:16,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:16,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:53:16,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:16,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:53:16,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:16,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-28 14:53:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:16,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:17,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:17,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2022-01-28 14:53:17,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:17,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:53:17,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:17,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:53:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:17,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024854694] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:17,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:17,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:53:17,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845221688] [2022-01-28 14:53:17,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:17,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:53:17,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:17,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:53:17,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:17,591 INFO L87 Difference]: Start difference. First operand 1479 states and 4930 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:19,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:19,125 INFO L93 Difference]: Finished difference Result 2172 states and 6670 transitions. [2022-01-28 14:53:19,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:53:19,125 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:19,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:19,128 INFO L225 Difference]: With dead ends: 2172 [2022-01-28 14:53:19,128 INFO L226 Difference]: Without dead ends: 1968 [2022-01-28 14:53:19,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2022-01-28 14:53:19,129 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 268 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:19,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 469 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1160 Invalid, 0 Unknown, 165 Unchecked, 0.5s Time] [2022-01-28 14:53:19,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2022-01-28 14:53:19,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1481. [2022-01-28 14:53:19,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 3.337162162162162) internal successors, (4939), 1480 states have internal predecessors, (4939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:19,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 4939 transitions. [2022-01-28 14:53:19,150 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 4939 transitions. Word has length 24 [2022-01-28 14:53:19,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:19,150 INFO L470 AbstractCegarLoop]: Abstraction has 1481 states and 4939 transitions. [2022-01-28 14:53:19,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 4939 transitions. [2022-01-28 14:53:19,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:19,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:19,151 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:19,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:19,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:19,352 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:19,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:19,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1570485741, now seen corresponding path program 134 times [2022-01-28 14:53:19,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:19,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146854929] [2022-01-28 14:53:19,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:19,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:19,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:19,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146854929] [2022-01-28 14:53:19,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146854929] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:19,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515284089] [2022-01-28 14:53:19,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:53:19,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:19,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:19,556 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:19,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-28 14:53:19,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:19,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:19,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:53:19,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:19,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:19,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:53:19,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:19,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:19,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:19,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:53:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:19,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:20,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:20,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2022-01-28 14:53:20,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:20,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:53:20,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:20,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:53:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:20,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515284089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:20,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:20,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:53:20,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015077558] [2022-01-28 14:53:20,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:20,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:53:20,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:20,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:53:20,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:20,741 INFO L87 Difference]: Start difference. First operand 1481 states and 4939 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:21,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:21,526 INFO L93 Difference]: Finished difference Result 1863 states and 5932 transitions. [2022-01-28 14:53:21,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:53:21,526 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:21,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:21,529 INFO L225 Difference]: With dead ends: 1863 [2022-01-28 14:53:21,529 INFO L226 Difference]: Without dead ends: 1710 [2022-01-28 14:53:21,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:53:21,530 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 167 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:21,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 264 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 775 Invalid, 0 Unknown, 128 Unchecked, 0.3s Time] [2022-01-28 14:53:21,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2022-01-28 14:53:21,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1482. [2022-01-28 14:53:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1481 states have (on average 3.337609723160027) internal successors, (4943), 1481 states have internal predecessors, (4943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:21,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 4943 transitions. [2022-01-28 14:53:21,548 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 4943 transitions. Word has length 24 [2022-01-28 14:53:21,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:21,548 INFO L470 AbstractCegarLoop]: Abstraction has 1482 states and 4943 transitions. [2022-01-28 14:53:21,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:21,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 4943 transitions. [2022-01-28 14:53:21,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:21,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:21,550 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:21,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-01-28 14:53:21,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-01-28 14:53:21,751 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:21,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:21,751 INFO L85 PathProgramCache]: Analyzing trace with hash -904727651, now seen corresponding path program 135 times [2022-01-28 14:53:21,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:21,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195701554] [2022-01-28 14:53:21,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:21,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:53:21,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:21,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195701554] [2022-01-28 14:53:21,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195701554] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:21,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145572888] [2022-01-28 14:53:21,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:53:21,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:21,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:21,952 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:21,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-28 14:53:21,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:53:21,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:21,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:53:21,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:22,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:22,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:53:22,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:22,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:22,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:22,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:53:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:53:22,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:22,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:22,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:53:23,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:23,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:53:23,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:23,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:53:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:53:23,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145572888] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:23,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:23,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:53:23,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255340057] [2022-01-28 14:53:23,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:23,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:53:23,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:23,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:53:23,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:23,049 INFO L87 Difference]: Start difference. First operand 1482 states and 4943 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:23,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:23,349 INFO L93 Difference]: Finished difference Result 1561 states and 5169 transitions. [2022-01-28 14:53:23,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:53:23,349 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:23,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:23,352 INFO L225 Difference]: With dead ends: 1561 [2022-01-28 14:53:23,352 INFO L226 Difference]: Without dead ends: 1534 [2022-01-28 14:53:23,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:53:23,352 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 46 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:23,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 202 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 563 Invalid, 0 Unknown, 250 Unchecked, 0.2s Time] [2022-01-28 14:53:23,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2022-01-28 14:53:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1488. [2022-01-28 14:53:23,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 3.340282447881641) internal successors, (4967), 1487 states have internal predecessors, (4967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:23,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 4967 transitions. [2022-01-28 14:53:23,369 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 4967 transitions. Word has length 24 [2022-01-28 14:53:23,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:23,369 INFO L470 AbstractCegarLoop]: Abstraction has 1488 states and 4967 transitions. [2022-01-28 14:53:23,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:23,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 4967 transitions. [2022-01-28 14:53:23,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:23,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:23,371 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:23,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-01-28 14:53:23,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:23,571 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:23,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:23,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1175917381, now seen corresponding path program 136 times [2022-01-28 14:53:23,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:23,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928652714] [2022-01-28 14:53:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:23,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:23,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:23,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928652714] [2022-01-28 14:53:23,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928652714] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:23,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71561687] [2022-01-28 14:53:23,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:53:23,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:23,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:23,762 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:23,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-28 14:53:23,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:53:23,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:23,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:53:23,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:23,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:53:24,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:53:24,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:53:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:24,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:24,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:24,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:53:24,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:24,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:53:24,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:24,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:53:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:24,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71561687] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:24,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:24,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:53:24,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968937763] [2022-01-28 14:53:24,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:24,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:53:24,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:24,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:53:24,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:24,809 INFO L87 Difference]: Start difference. First operand 1488 states and 4967 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:25,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:25,561 INFO L93 Difference]: Finished difference Result 1830 states and 5917 transitions. [2022-01-28 14:53:25,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:53:25,561 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:25,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:25,564 INFO L225 Difference]: With dead ends: 1830 [2022-01-28 14:53:25,564 INFO L226 Difference]: Without dead ends: 1712 [2022-01-28 14:53:25,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:53:25,564 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 154 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:25,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 229 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:53:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2022-01-28 14:53:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1505. [2022-01-28 14:53:25,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 3.33843085106383) internal successors, (5021), 1504 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:25,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 5021 transitions. [2022-01-28 14:53:25,582 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 5021 transitions. Word has length 24 [2022-01-28 14:53:25,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:25,583 INFO L470 AbstractCegarLoop]: Abstraction has 1505 states and 5021 transitions. [2022-01-28 14:53:25,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:25,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 5021 transitions. [2022-01-28 14:53:25,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:25,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:25,585 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:25,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-01-28 14:53:25,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:25,785 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:25,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:25,785 INFO L85 PathProgramCache]: Analyzing trace with hash 691514611, now seen corresponding path program 137 times [2022-01-28 14:53:25,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:25,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235662001] [2022-01-28 14:53:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:25,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:25,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:25,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235662001] [2022-01-28 14:53:25,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235662001] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:25,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742641112] [2022-01-28 14:53:25,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:53:25,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:25,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:25,971 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:25,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-28 14:53:25,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:53:25,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:25,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:53:25,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:26,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:26,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:53:26,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:26,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:53:26,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:26,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-28 14:53:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:26,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:26,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:26,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:53:26,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:26,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:53:26,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:26,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:53:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:26,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742641112] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:26,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:26,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:53:26,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992207234] [2022-01-28 14:53:26,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:26,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:53:26,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:26,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:53:26,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:26,905 INFO L87 Difference]: Start difference. First operand 1505 states and 5021 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:27,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:27,113 INFO L93 Difference]: Finished difference Result 1600 states and 5275 transitions. [2022-01-28 14:53:27,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:53:27,113 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:27,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:27,116 INFO L225 Difference]: With dead ends: 1600 [2022-01-28 14:53:27,116 INFO L226 Difference]: Without dead ends: 1565 [2022-01-28 14:53:27,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:53:27,116 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:27,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 220 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 374 Invalid, 0 Unknown, 139 Unchecked, 0.1s Time] [2022-01-28 14:53:27,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2022-01-28 14:53:27,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1503. [2022-01-28 14:53:27,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 3.3395472703062583) internal successors, (5016), 1502 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:27,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 5016 transitions. [2022-01-28 14:53:27,133 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 5016 transitions. Word has length 24 [2022-01-28 14:53:27,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:27,133 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 5016 transitions. [2022-01-28 14:53:27,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:27,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 5016 transitions. [2022-01-28 14:53:27,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:27,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:27,135 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:27,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:27,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:27,336 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:27,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:27,336 INFO L85 PathProgramCache]: Analyzing trace with hash 61894819, now seen corresponding path program 138 times [2022-01-28 14:53:27,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:27,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757183461] [2022-01-28 14:53:27,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:27,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:27,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:27,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757183461] [2022-01-28 14:53:27,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757183461] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:27,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257540806] [2022-01-28 14:53:27,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:53:27,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:27,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:27,502 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:27,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-28 14:53:27,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:53:27,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:27,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:53:27,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:27,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-28 14:53:27,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:27,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:53:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:27,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:28,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:28,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 51 [2022-01-28 14:53:28,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:28,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 93 [2022-01-28 14:53:28,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:28,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 71 [2022-01-28 14:53:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:28,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257540806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:28,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:28,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:53:28,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140651862] [2022-01-28 14:53:28,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:28,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:53:28,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:28,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:53:28,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:53:28,319 INFO L87 Difference]: Start difference. First operand 1503 states and 5016 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:28,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:28,726 INFO L93 Difference]: Finished difference Result 1666 states and 5452 transitions. [2022-01-28 14:53:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:53:28,726 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:28,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:28,729 INFO L225 Difference]: With dead ends: 1666 [2022-01-28 14:53:28,729 INFO L226 Difference]: Without dead ends: 1576 [2022-01-28 14:53:28,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:53:28,729 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:28,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 189 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:53:28,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2022-01-28 14:53:28,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1510. [2022-01-28 14:53:28,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 3.337972166998012) internal successors, (5037), 1509 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:28,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5037 transitions. [2022-01-28 14:53:28,745 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5037 transitions. Word has length 24 [2022-01-28 14:53:28,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:28,746 INFO L470 AbstractCegarLoop]: Abstraction has 1510 states and 5037 transitions. [2022-01-28 14:53:28,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:28,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5037 transitions. [2022-01-28 14:53:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:28,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:28,747 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:28,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-01-28 14:53:28,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:28,948 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:28,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:28,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1225827993, now seen corresponding path program 139 times [2022-01-28 14:53:28,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:28,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069457281] [2022-01-28 14:53:28,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:28,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:29,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:29,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069457281] [2022-01-28 14:53:29,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069457281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:29,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438592869] [2022-01-28 14:53:29,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:53:29,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:29,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:29,090 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:29,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-28 14:53:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:29,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:53:29,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:29,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:29,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-28 14:53:29,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:29,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:53:29,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:29,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:53:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:29,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:29,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:29,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2022-01-28 14:53:30,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:30,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 114 [2022-01-28 14:53:30,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:30,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 86 [2022-01-28 14:53:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:30,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438592869] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:30,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:30,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:53:30,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180677096] [2022-01-28 14:53:30,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:30,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:30,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:30,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:30,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:30,238 INFO L87 Difference]: Start difference. First operand 1510 states and 5037 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:30,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:30,425 INFO L93 Difference]: Finished difference Result 1593 states and 5279 transitions. [2022-01-28 14:53:30,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:53:30,426 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:30,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:30,429 INFO L225 Difference]: With dead ends: 1593 [2022-01-28 14:53:30,429 INFO L226 Difference]: Without dead ends: 1558 [2022-01-28 14:53:30,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:30,429 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:30,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 169 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 429 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-01-28 14:53:30,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2022-01-28 14:53:30,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1510. [2022-01-28 14:53:30,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 3.337972166998012) internal successors, (5037), 1509 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5037 transitions. [2022-01-28 14:53:30,447 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5037 transitions. Word has length 24 [2022-01-28 14:53:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:30,447 INFO L470 AbstractCegarLoop]: Abstraction has 1510 states and 5037 transitions. [2022-01-28 14:53:30,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:30,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5037 transitions. [2022-01-28 14:53:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:30,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:30,449 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:30,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:30,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2022-01-28 14:53:30,650 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:30,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:30,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1593521725, now seen corresponding path program 140 times [2022-01-28 14:53:30,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:30,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061835882] [2022-01-28 14:53:30,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:30,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:30,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:30,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061835882] [2022-01-28 14:53:30,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061835882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:30,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536811408] [2022-01-28 14:53:30,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:53:30,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:30,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:30,812 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:30,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-28 14:53:30,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:30,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:30,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:53:30,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:30,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:30,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:30,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:53:30,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:30,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:53:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:31,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:31,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:31,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 84 [2022-01-28 14:53:31,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:31,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 71 [2022-01-28 14:53:31,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:31,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-01-28 14:53:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:31,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536811408] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:31,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:31,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:53:31,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549352212] [2022-01-28 14:53:31,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:31,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:53:31,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:31,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:53:31,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:53:31,945 INFO L87 Difference]: Start difference. First operand 1510 states and 5037 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:32,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:32,582 INFO L93 Difference]: Finished difference Result 1706 states and 5545 transitions. [2022-01-28 14:53:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:53:32,583 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:32,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:32,586 INFO L225 Difference]: With dead ends: 1706 [2022-01-28 14:53:32,586 INFO L226 Difference]: Without dead ends: 1622 [2022-01-28 14:53:32,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:53:32,586 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 94 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:32,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 259 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:53:32,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2022-01-28 14:53:32,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1514. [2022-01-28 14:53:32,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 3.337078651685393) internal successors, (5049), 1513 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:32,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 5049 transitions. [2022-01-28 14:53:32,604 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 5049 transitions. Word has length 24 [2022-01-28 14:53:32,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:32,604 INFO L470 AbstractCegarLoop]: Abstraction has 1514 states and 5049 transitions. [2022-01-28 14:53:32,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:32,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 5049 transitions. [2022-01-28 14:53:32,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:32,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:32,606 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:32,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-01-28 14:53:32,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-01-28 14:53:32,806 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:32,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:32,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1037036391, now seen corresponding path program 141 times [2022-01-28 14:53:32,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:32,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043125098] [2022-01-28 14:53:32,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:32,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:32,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:32,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043125098] [2022-01-28 14:53:32,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043125098] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:32,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900288298] [2022-01-28 14:53:32,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:53:32,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:32,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:32,978 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:32,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-28 14:53:33,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:53:33,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:33,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:53:33,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:33,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:53:33,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:33,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:33,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:33,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:53:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:33,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:33,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:33,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 68 [2022-01-28 14:53:33,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:33,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 93 [2022-01-28 14:53:33,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:33,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 71 [2022-01-28 14:53:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:34,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900288298] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:34,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:34,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:53:34,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761523072] [2022-01-28 14:53:34,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:34,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:53:34,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:34,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:53:34,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:34,046 INFO L87 Difference]: Start difference. First operand 1514 states and 5049 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:34,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:34,395 INFO L93 Difference]: Finished difference Result 1675 states and 5476 transitions. [2022-01-28 14:53:34,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:53:34,395 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:34,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:34,397 INFO L225 Difference]: With dead ends: 1675 [2022-01-28 14:53:34,398 INFO L226 Difference]: Without dead ends: 1585 [2022-01-28 14:53:34,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:53:34,398 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:34,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 292 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 614 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-01-28 14:53:34,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2022-01-28 14:53:34,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1516. [2022-01-28 14:53:34,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.337953795379538) internal successors, (5057), 1515 states have internal predecessors, (5057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:34,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 5057 transitions. [2022-01-28 14:53:34,414 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 5057 transitions. Word has length 24 [2022-01-28 14:53:34,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:34,414 INFO L470 AbstractCegarLoop]: Abstraction has 1516 states and 5057 transitions. [2022-01-28 14:53:34,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:34,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 5057 transitions. [2022-01-28 14:53:34,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:34,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:34,416 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:34,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-01-28 14:53:34,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:34,625 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:34,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:34,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2093997731, now seen corresponding path program 142 times [2022-01-28 14:53:34,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:34,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016669462] [2022-01-28 14:53:34,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:34,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:34,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:34,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016669462] [2022-01-28 14:53:34,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016669462] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:34,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734638471] [2022-01-28 14:53:34,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:53:34,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:34,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:34,795 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:34,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-28 14:53:34,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:53:34,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:34,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:53:34,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:34,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:53:34,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:53:34,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:53:34,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:53:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:35,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:35,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:35,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:53:35,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:35,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 114 [2022-01-28 14:53:35,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:35,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 86 [2022-01-28 14:53:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:35,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734638471] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:35,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:35,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:53:35,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685231272] [2022-01-28 14:53:35,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:35,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:53:35,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:35,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:53:35,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:53:35,819 INFO L87 Difference]: Start difference. First operand 1516 states and 5057 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:36,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:36,444 INFO L93 Difference]: Finished difference Result 1787 states and 5797 transitions. [2022-01-28 14:53:36,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:53:36,444 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:36,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:36,448 INFO L225 Difference]: With dead ends: 1787 [2022-01-28 14:53:36,448 INFO L226 Difference]: Without dead ends: 1686 [2022-01-28 14:53:36,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:53:36,448 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 89 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:36,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 228 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:53:36,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2022-01-28 14:53:36,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1528. [2022-01-28 14:53:36,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 3.337262606417813) internal successors, (5096), 1527 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:36,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 5096 transitions. [2022-01-28 14:53:36,475 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 5096 transitions. Word has length 24 [2022-01-28 14:53:36,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:36,475 INFO L470 AbstractCegarLoop]: Abstraction has 1528 states and 5096 transitions. [2022-01-28 14:53:36,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 5096 transitions. [2022-01-28 14:53:36,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:36,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:36,477 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:36,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-01-28 14:53:36,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-01-28 14:53:36,677 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:36,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:36,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1345587235, now seen corresponding path program 143 times [2022-01-28 14:53:36,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:36,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980012090] [2022-01-28 14:53:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:36,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:36,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:36,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980012090] [2022-01-28 14:53:36,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980012090] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:36,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229954925] [2022-01-28 14:53:36,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:53:36,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:36,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:36,856 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:36,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-28 14:53:36,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:53:36,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:36,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:53:36,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:36,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:53:37,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:37,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:37,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:37,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:53:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:37,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:37,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:37,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 66 [2022-01-28 14:53:37,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:37,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 76 [2022-01-28 14:53:37,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:37,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 58 [2022-01-28 14:53:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:37,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229954925] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:37,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:37,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:53:37,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666411726] [2022-01-28 14:53:37,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:37,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:53:37,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:37,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:53:37,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:37,837 INFO L87 Difference]: Start difference. First operand 1528 states and 5096 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:38,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:38,298 INFO L93 Difference]: Finished difference Result 1657 states and 5415 transitions. [2022-01-28 14:53:38,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:53:38,298 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:38,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:38,301 INFO L225 Difference]: With dead ends: 1657 [2022-01-28 14:53:38,301 INFO L226 Difference]: Without dead ends: 1583 [2022-01-28 14:53:38,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:53:38,302 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:38,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 240 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 679 Invalid, 0 Unknown, 64 Unchecked, 0.3s Time] [2022-01-28 14:53:38,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2022-01-28 14:53:38,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1520. [2022-01-28 14:53:38,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.3396971691902566) internal successors, (5073), 1519 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:38,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 5073 transitions. [2022-01-28 14:53:38,319 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 5073 transitions. Word has length 24 [2022-01-28 14:53:38,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:38,319 INFO L470 AbstractCegarLoop]: Abstraction has 1520 states and 5073 transitions. [2022-01-28 14:53:38,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:38,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 5073 transitions. [2022-01-28 14:53:38,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:38,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:38,321 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:38,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:38,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-01-28 14:53:38,521 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:38,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:38,521 INFO L85 PathProgramCache]: Analyzing trace with hash -199554205, now seen corresponding path program 144 times [2022-01-28 14:53:38,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:38,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385442202] [2022-01-28 14:53:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:38,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:38,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:38,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385442202] [2022-01-28 14:53:38,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385442202] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:38,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482744182] [2022-01-28 14:53:38,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:53:38,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:38,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:38,702 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:38,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-28 14:53:38,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:53:38,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:38,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:53:38,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:38,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:38,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:53:39,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:39,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:53:39,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:39,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:53:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:39,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:39,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:39,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 68 [2022-01-28 14:53:39,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:39,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 98 [2022-01-28 14:53:39,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:39,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 76 [2022-01-28 14:53:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:40,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482744182] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:40,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:40,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:53:40,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800442820] [2022-01-28 14:53:40,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:40,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:53:40,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:40,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:53:40,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:40,023 INFO L87 Difference]: Start difference. First operand 1520 states and 5073 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:40,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:40,283 INFO L93 Difference]: Finished difference Result 1594 states and 5268 transitions. [2022-01-28 14:53:40,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:53:40,283 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:40,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:40,286 INFO L225 Difference]: With dead ends: 1594 [2022-01-28 14:53:40,286 INFO L226 Difference]: Without dead ends: 1555 [2022-01-28 14:53:40,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:53:40,286 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:40,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 198 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 547 Invalid, 0 Unknown, 241 Unchecked, 0.2s Time] [2022-01-28 14:53:40,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2022-01-28 14:53:40,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1520. [2022-01-28 14:53:40,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.3396971691902566) internal successors, (5073), 1519 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:40,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 5073 transitions. [2022-01-28 14:53:40,302 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 5073 transitions. Word has length 24 [2022-01-28 14:53:40,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:40,303 INFO L470 AbstractCegarLoop]: Abstraction has 1520 states and 5073 transitions. [2022-01-28 14:53:40,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:40,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 5073 transitions. [2022-01-28 14:53:40,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:40,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:40,304 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:40,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:40,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-01-28 14:53:40,505 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:40,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1126356007, now seen corresponding path program 145 times [2022-01-28 14:53:40,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:40,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568239212] [2022-01-28 14:53:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:40,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:40,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:40,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568239212] [2022-01-28 14:53:40,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568239212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:40,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969109506] [2022-01-28 14:53:40,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:53:40,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:40,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:40,669 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:40,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-28 14:53:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:40,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:53:40,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:40,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:53:40,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:40,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:53:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:40,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:41,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:41,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:53:41,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:41,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 108 [2022-01-28 14:53:41,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:41,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 80 [2022-01-28 14:53:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:41,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969109506] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:41,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:41,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:53:41,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704825982] [2022-01-28 14:53:41,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:41,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:53:41,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:41,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:53:41,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:53:41,840 INFO L87 Difference]: Start difference. First operand 1520 states and 5073 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:42,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:42,249 INFO L93 Difference]: Finished difference Result 1722 states and 5596 transitions. [2022-01-28 14:53:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:53:42,249 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:42,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:42,252 INFO L225 Difference]: With dead ends: 1722 [2022-01-28 14:53:42,252 INFO L226 Difference]: Without dead ends: 1645 [2022-01-28 14:53:42,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:53:42,253 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 92 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:42,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 219 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:53:42,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-01-28 14:53:42,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1523. [2022-01-28 14:53:42,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 3.338370565045992) internal successors, (5081), 1522 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:42,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 5081 transitions. [2022-01-28 14:53:42,271 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 5081 transitions. Word has length 24 [2022-01-28 14:53:42,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:42,271 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 5081 transitions. [2022-01-28 14:53:42,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:42,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 5081 transitions. [2022-01-28 14:53:42,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:42,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:42,273 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:42,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-01-28 14:53:42,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:42,473 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:42,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:42,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1810324647, now seen corresponding path program 146 times [2022-01-28 14:53:42,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:42,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374191414] [2022-01-28 14:53:42,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:42,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:42,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:42,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374191414] [2022-01-28 14:53:42,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374191414] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:42,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449957429] [2022-01-28 14:53:42,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:53:42,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:42,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:42,684 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:42,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-28 14:53:42,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:42,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:42,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:53:42,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:42,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:53:42,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:42,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:53:42,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:42,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:53:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:43,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:43,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:43,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2022-01-28 14:53:43,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:43,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2022-01-28 14:53:43,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:43,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2022-01-28 14:53:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:43,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449957429] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:43,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:43,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:53:43,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858350312] [2022-01-28 14:53:43,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:43,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:53:43,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:43,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:53:43,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:43,814 INFO L87 Difference]: Start difference. First operand 1523 states and 5081 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:44,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:44,399 INFO L93 Difference]: Finished difference Result 1782 states and 5730 transitions. [2022-01-28 14:53:44,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:53:44,400 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:44,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:44,403 INFO L225 Difference]: With dead ends: 1782 [2022-01-28 14:53:44,403 INFO L226 Difference]: Without dead ends: 1689 [2022-01-28 14:53:44,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:53:44,403 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 156 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:44,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 213 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 622 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2022-01-28 14:53:44,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2022-01-28 14:53:44,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1524. [2022-01-28 14:53:44,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 3.3394615889691397) internal successors, (5086), 1523 states have internal predecessors, (5086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:44,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 5086 transitions. [2022-01-28 14:53:44,421 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 5086 transitions. Word has length 24 [2022-01-28 14:53:44,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:44,422 INFO L470 AbstractCegarLoop]: Abstraction has 1524 states and 5086 transitions. [2022-01-28 14:53:44,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:44,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 5086 transitions. [2022-01-28 14:53:44,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:44,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:44,424 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:44,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-01-28 14:53:44,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:44,624 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:44,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:44,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1911717885, now seen corresponding path program 147 times [2022-01-28 14:53:44,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:44,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662170458] [2022-01-28 14:53:44,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:44,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:44,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:44,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662170458] [2022-01-28 14:53:44,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662170458] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:44,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24996514] [2022-01-28 14:53:44,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:53:44,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:44,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:44,852 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:44,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-28 14:53:44,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:53:44,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:44,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:53:44,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:44,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:53:45,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:45,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:53:45,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:45,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:53:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:45,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:45,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:45,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:53:45,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:45,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 108 [2022-01-28 14:53:45,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:45,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 80 [2022-01-28 14:53:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:45,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24996514] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:45,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:45,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:53:45,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270602042] [2022-01-28 14:53:45,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:45,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:53:45,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:45,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:53:45,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:45,913 INFO L87 Difference]: Start difference. First operand 1524 states and 5086 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:46,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:46,208 INFO L93 Difference]: Finished difference Result 1627 states and 5372 transitions. [2022-01-28 14:53:46,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:53:46,209 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:46,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:46,212 INFO L225 Difference]: With dead ends: 1627 [2022-01-28 14:53:46,212 INFO L226 Difference]: Without dead ends: 1596 [2022-01-28 14:53:46,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:53:46,212 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 68 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:46,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 209 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 681 Invalid, 0 Unknown, 4 Unchecked, 0.3s Time] [2022-01-28 14:53:46,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2022-01-28 14:53:46,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1523. [2022-01-28 14:53:46,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 3.338370565045992) internal successors, (5081), 1522 states have internal predecessors, (5081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:46,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 5081 transitions. [2022-01-28 14:53:46,230 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 5081 transitions. Word has length 24 [2022-01-28 14:53:46,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:46,230 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 5081 transitions. [2022-01-28 14:53:46,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:46,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 5081 transitions. [2022-01-28 14:53:46,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:46,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:46,232 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:46,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:46,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:46,433 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:46,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:46,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1389590713, now seen corresponding path program 148 times [2022-01-28 14:53:46,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:46,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220711903] [2022-01-28 14:53:46,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:46,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:46,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:46,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220711903] [2022-01-28 14:53:46,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220711903] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:46,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737442820] [2022-01-28 14:53:46,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:53:46,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:46,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:46,598 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:46,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-28 14:53:46,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:53:46,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:46,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:53:46,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:46,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:46,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:53:46,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 14:53:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:46,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:47,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:47,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:53:47,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:47,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 83 [2022-01-28 14:53:47,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:47,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 63 [2022-01-28 14:53:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:47,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737442820] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:47,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:47,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:53:47,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567418561] [2022-01-28 14:53:47,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:47,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:53:47,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:47,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:53:47,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:53:47,739 INFO L87 Difference]: Start difference. First operand 1523 states and 5081 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:48,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:48,448 INFO L93 Difference]: Finished difference Result 1771 states and 5775 transitions. [2022-01-28 14:53:48,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:53:48,448 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:48,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:48,451 INFO L225 Difference]: With dead ends: 1771 [2022-01-28 14:53:48,451 INFO L226 Difference]: Without dead ends: 1687 [2022-01-28 14:53:48,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:53:48,452 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:48,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 288 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:53:48,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1687 states. [2022-01-28 14:53:48,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1687 to 1527. [2022-01-28 14:53:48,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 3.3394495412844036) internal successors, (5096), 1526 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:48,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 5096 transitions. [2022-01-28 14:53:48,469 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 5096 transitions. Word has length 24 [2022-01-28 14:53:48,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:48,469 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 5096 transitions. [2022-01-28 14:53:48,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:48,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 5096 transitions. [2022-01-28 14:53:48,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:48,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:48,471 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:48,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-01-28 14:53:48,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:48,672 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:48,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:48,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1081039869, now seen corresponding path program 149 times [2022-01-28 14:53:48,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:48,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344231488] [2022-01-28 14:53:48,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:48,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:48,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:48,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344231488] [2022-01-28 14:53:48,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344231488] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:48,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602095780] [2022-01-28 14:53:48,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:53:48,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:48,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:48,894 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:48,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-28 14:53:48,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:53:48,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:48,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:53:48,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:49,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:49,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:49,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:49,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:53:49,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:49,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:53:49,198 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:49,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:49,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:49,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:53:49,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:49,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 114 [2022-01-28 14:53:49,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:49,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 86 [2022-01-28 14:53:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:50,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602095780] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:50,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:50,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:53:50,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855806167] [2022-01-28 14:53:50,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:50,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:53:50,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:50,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:53:50,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:50,049 INFO L87 Difference]: Start difference. First operand 1527 states and 5096 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:50,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:50,835 INFO L93 Difference]: Finished difference Result 1720 states and 5588 transitions. [2022-01-28 14:53:50,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:53:50,836 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:50,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:50,839 INFO L225 Difference]: With dead ends: 1720 [2022-01-28 14:53:50,839 INFO L226 Difference]: Without dead ends: 1619 [2022-01-28 14:53:50,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:53:50,839 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 141 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:50,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 164 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 571 Invalid, 0 Unknown, 108 Unchecked, 0.3s Time] [2022-01-28 14:53:50,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2022-01-28 14:53:50,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1527. [2022-01-28 14:53:50,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 3.3394495412844036) internal successors, (5096), 1526 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:50,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 5096 transitions. [2022-01-28 14:53:50,864 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 5096 transitions. Word has length 24 [2022-01-28 14:53:50,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:50,864 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 5096 transitions. [2022-01-28 14:53:50,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:50,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 5096 transitions. [2022-01-28 14:53:50,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:50,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:50,866 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:50,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:51,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:51,067 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:51,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:51,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1343189763, now seen corresponding path program 150 times [2022-01-28 14:53:51,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:51,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738357135] [2022-01-28 14:53:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:51,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:53:51,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:51,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738357135] [2022-01-28 14:53:51,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738357135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:51,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786626414] [2022-01-28 14:53:51,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:53:51,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:51,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:51,311 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:51,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-28 14:53:51,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:53:51,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:51,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:53:51,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:51,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:51,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:51,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:51,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:53:51,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:51,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:53:51,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:53:51,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:52,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:52,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:53:52,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:52,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 108 [2022-01-28 14:53:52,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:52,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 80 [2022-01-28 14:53:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:53:52,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786626414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:52,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:52,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:53:52,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48929598] [2022-01-28 14:53:52,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:52,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:53:52,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:52,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:53:52,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:52,509 INFO L87 Difference]: Start difference. First operand 1527 states and 5096 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:52,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:52,783 INFO L93 Difference]: Finished difference Result 1613 states and 5334 transitions. [2022-01-28 14:53:52,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:53:52,783 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:52,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:52,786 INFO L225 Difference]: With dead ends: 1613 [2022-01-28 14:53:52,786 INFO L226 Difference]: Without dead ends: 1594 [2022-01-28 14:53:52,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:53:52,786 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 61 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:52,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 193 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 522 Invalid, 0 Unknown, 147 Unchecked, 0.2s Time] [2022-01-28 14:53:52,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2022-01-28 14:53:52,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1527. [2022-01-28 14:53:52,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 3.3394495412844036) internal successors, (5096), 1526 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:52,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 5096 transitions. [2022-01-28 14:53:52,804 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 5096 transitions. Word has length 24 [2022-01-28 14:53:52,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:52,804 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 5096 transitions. [2022-01-28 14:53:52,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:52,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 5096 transitions. [2022-01-28 14:53:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:52,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:52,806 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:52,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-01-28 14:53:53,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:53,007 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:53,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:53,007 INFO L85 PathProgramCache]: Analyzing trace with hash 82535079, now seen corresponding path program 151 times [2022-01-28 14:53:53,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:53,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041973621] [2022-01-28 14:53:53,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:53,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:53,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:53,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041973621] [2022-01-28 14:53:53,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041973621] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:53,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855630241] [2022-01-28 14:53:53,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:53:53,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:53,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:53,205 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:53,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-28 14:53:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:53,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:53:53,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:53,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:53,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:53,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:53,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:53:53,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:53,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 14:53:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:53,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:54,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:54,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:53:54,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:54,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 82 [2022-01-28 14:53:54,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:54,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 62 [2022-01-28 14:53:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:54,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855630241] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:54,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:54,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:53:54,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572725878] [2022-01-28 14:53:54,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:54,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:53:54,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:54,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:53:54,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:54,343 INFO L87 Difference]: Start difference. First operand 1527 states and 5096 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:55,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:55,149 INFO L93 Difference]: Finished difference Result 1706 states and 5539 transitions. [2022-01-28 14:53:55,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:53:55,149 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:55,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:55,152 INFO L225 Difference]: With dead ends: 1706 [2022-01-28 14:53:55,152 INFO L226 Difference]: Without dead ends: 1624 [2022-01-28 14:53:55,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:53:55,153 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 97 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:55,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 232 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 744 Invalid, 0 Unknown, 34 Unchecked, 0.3s Time] [2022-01-28 14:53:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2022-01-28 14:53:55,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1529. [2022-01-28 14:53:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.3383507853403143) internal successors, (5101), 1528 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:55,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5101 transitions. [2022-01-28 14:53:55,171 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5101 transitions. Word has length 24 [2022-01-28 14:53:55,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:55,171 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 5101 transitions. [2022-01-28 14:53:55,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:55,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5101 transitions. [2022-01-28 14:53:55,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:55,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:55,173 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:55,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:55,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-01-28 14:53:55,373 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:55,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:55,373 INFO L85 PathProgramCache]: Analyzing trace with hash 299283367, now seen corresponding path program 152 times [2022-01-28 14:53:55,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:55,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167090410] [2022-01-28 14:53:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:55,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:53:55,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:55,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167090410] [2022-01-28 14:53:55,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167090410] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:55,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817563551] [2022-01-28 14:53:55,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:53:55,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:55,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:55,552 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:55,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-28 14:53:55,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:55,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:55,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:53:55,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:55,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:55,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:55,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:55,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:53:55,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:55,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 14:53:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:53:55,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:56,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:56,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:53:56,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:56,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 88 [2022-01-28 14:53:56,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:56,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 66 [2022-01-28 14:53:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:53:56,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817563551] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:56,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:56,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:53:56,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187080571] [2022-01-28 14:53:56,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:56,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:53:56,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:56,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:53:56,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:53:56,742 INFO L87 Difference]: Start difference. First operand 1529 states and 5101 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:57,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:57,077 INFO L93 Difference]: Finished difference Result 1641 states and 5374 transitions. [2022-01-28 14:53:57,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:53:57,077 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:57,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:57,080 INFO L225 Difference]: With dead ends: 1641 [2022-01-28 14:53:57,080 INFO L226 Difference]: Without dead ends: 1588 [2022-01-28 14:53:57,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:53:57,081 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:57,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 224 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 666 Invalid, 0 Unknown, 217 Unchecked, 0.3s Time] [2022-01-28 14:53:57,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2022-01-28 14:53:57,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1529. [2022-01-28 14:53:57,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.337041884816754) internal successors, (5099), 1528 states have internal predecessors, (5099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:57,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5099 transitions. [2022-01-28 14:53:57,099 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5099 transitions. Word has length 24 [2022-01-28 14:53:57,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:57,099 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 5099 transitions. [2022-01-28 14:53:57,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:57,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5099 transitions. [2022-01-28 14:53:57,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:57,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:57,101 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:57,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:57,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-01-28 14:53:57,301 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:57,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:57,301 INFO L85 PathProgramCache]: Analyzing trace with hash 715638361, now seen corresponding path program 153 times [2022-01-28 14:53:57,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:57,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81800229] [2022-01-28 14:53:57,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:57,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:57,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:57,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:57,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81800229] [2022-01-28 14:53:57,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81800229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:57,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249509178] [2022-01-28 14:53:57,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:53:57,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:57,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:57,455 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:57,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-01-28 14:53:57,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:53:57,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:57,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:53:57,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:57,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:53:57,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:53:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:57,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:58,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:58,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:53:58,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:58,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:53:58,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:58,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:53:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:58,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249509178] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:58,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:58,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:53:58,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279502705] [2022-01-28 14:53:58,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:58,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:58,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:58,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:58,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:58,404 INFO L87 Difference]: Start difference. First operand 1529 states and 5099 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:58,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:58,940 INFO L93 Difference]: Finished difference Result 1653 states and 5466 transitions. [2022-01-28 14:53:58,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:53:58,941 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:53:58,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:58,943 INFO L225 Difference]: With dead ends: 1653 [2022-01-28 14:53:58,943 INFO L226 Difference]: Without dead ends: 1622 [2022-01-28 14:53:58,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:53:58,944 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 82 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:58,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 203 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:53:58,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2022-01-28 14:53:58,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1534. [2022-01-28 14:53:58,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1533 states have (on average 3.336594911937378) internal successors, (5115), 1533 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:58,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 5115 transitions. [2022-01-28 14:53:58,961 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 5115 transitions. Word has length 24 [2022-01-28 14:53:58,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:58,961 INFO L470 AbstractCegarLoop]: Abstraction has 1534 states and 5115 transitions. [2022-01-28 14:53:58,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:58,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 5115 transitions. [2022-01-28 14:53:58,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:53:58,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:58,963 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:58,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:59,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-01-28 14:53:59,163 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:59,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:59,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1879571535, now seen corresponding path program 154 times [2022-01-28 14:53:59,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:59,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379907427] [2022-01-28 14:53:59,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:59,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:59,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:59,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379907427] [2022-01-28 14:53:59,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379907427] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:59,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90611349] [2022-01-28 14:53:59,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:53:59,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:59,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:59,341 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:53:59,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-01-28 14:53:59,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:53:59,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:59,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:53:59,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:59,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:53:59,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:53:59,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:53:59,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:53:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:53:59,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:00,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:00,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:54:00,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:00,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:54:00,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:00,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:54:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:00,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90611349] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:00,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:00,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:54:00,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831355289] [2022-01-28 14:54:00,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:00,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:54:00,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:00,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:54:00,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:54:00,262 INFO L87 Difference]: Start difference. First operand 1534 states and 5115 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:01,144 INFO L93 Difference]: Finished difference Result 1850 states and 6001 transitions. [2022-01-28 14:54:01,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:54:01,144 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:01,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:01,147 INFO L225 Difference]: With dead ends: 1850 [2022-01-28 14:54:01,147 INFO L226 Difference]: Without dead ends: 1749 [2022-01-28 14:54:01,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:54:01,148 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 101 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:01,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 313 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:54:01,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2022-01-28 14:54:01,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1541. [2022-01-28 14:54:01,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1540 states have (on average 3.3396103896103897) internal successors, (5143), 1540 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:01,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 5143 transitions. [2022-01-28 14:54:01,167 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 5143 transitions. Word has length 24 [2022-01-28 14:54:01,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:01,167 INFO L470 AbstractCegarLoop]: Abstraction has 1541 states and 5143 transitions. [2022-01-28 14:54:01,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:01,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 5143 transitions. [2022-01-28 14:54:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:01,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:01,169 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:01,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-01-28 14:54:01,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:01,370 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:01,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:01,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1442654375, now seen corresponding path program 155 times [2022-01-28 14:54:01,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:01,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145106704] [2022-01-28 14:54:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:01,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:54:01,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:01,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145106704] [2022-01-28 14:54:01,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145106704] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:01,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535415097] [2022-01-28 14:54:01,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:54:01,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:01,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:01,561 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:01,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-01-28 14:54:01,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 14:54:01,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:01,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:54:01,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:01,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:54:01,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:01,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:54:01,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:01,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:54:01,956 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:54:01,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:02,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:02,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:54:02,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:02,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:54:02,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:02,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:54:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:54:02,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535415097] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:02,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:02,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:54:02,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122934335] [2022-01-28 14:54:02,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:02,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:54:02,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:02,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:54:02,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:02,730 INFO L87 Difference]: Start difference. First operand 1541 states and 5143 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:02,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:02,964 INFO L93 Difference]: Finished difference Result 1700 states and 5583 transitions. [2022-01-28 14:54:02,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:54:02,964 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:02,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:02,967 INFO L225 Difference]: With dead ends: 1700 [2022-01-28 14:54:02,967 INFO L226 Difference]: Without dead ends: 1662 [2022-01-28 14:54:02,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:54:02,967 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 100 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:02,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 163 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 451 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2022-01-28 14:54:02,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2022-01-28 14:54:02,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1538. [2022-01-28 14:54:02,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.3383214053350683) internal successors, (5131), 1537 states have internal predecessors, (5131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:02,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5131 transitions. [2022-01-28 14:54:02,986 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5131 transitions. Word has length 24 [2022-01-28 14:54:02,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:02,986 INFO L470 AbstractCegarLoop]: Abstraction has 1538 states and 5131 transitions. [2022-01-28 14:54:02,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5131 transitions. [2022-01-28 14:54:02,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:02,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:02,988 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:03,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-01-28 14:54:03,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:03,189 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:03,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:03,189 INFO L85 PathProgramCache]: Analyzing trace with hash 804957977, now seen corresponding path program 156 times [2022-01-28 14:54:03,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:03,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588088619] [2022-01-28 14:54:03,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:03,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:03,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:03,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588088619] [2022-01-28 14:54:03,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588088619] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:03,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804076539] [2022-01-28 14:54:03,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:54:03,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:03,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:03,373 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:03,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-01-28 14:54:03,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:54:03,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:03,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:54:03,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:03,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:54:03,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:03,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:03,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:03,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:54:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:03,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:04,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:04,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:54:04,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:04,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:54:04,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:04,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:54:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:04,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804076539] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:04,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:04,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:54:04,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103491534] [2022-01-28 14:54:04,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:04,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:04,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:04,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:04,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:04,583 INFO L87 Difference]: Start difference. First operand 1538 states and 5131 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:04,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:04,875 INFO L93 Difference]: Finished difference Result 1689 states and 5591 transitions. [2022-01-28 14:54:04,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:54:04,876 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:04,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:04,878 INFO L225 Difference]: With dead ends: 1689 [2022-01-28 14:54:04,879 INFO L226 Difference]: Without dead ends: 1631 [2022-01-28 14:54:04,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:04,879 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 111 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:04,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 178 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 586 Invalid, 0 Unknown, 176 Unchecked, 0.2s Time] [2022-01-28 14:54:04,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2022-01-28 14:54:04,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1541. [2022-01-28 14:54:04,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1540 states have (on average 3.3396103896103897) internal successors, (5143), 1540 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:04,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 5143 transitions. [2022-01-28 14:54:04,897 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 5143 transitions. Word has length 24 [2022-01-28 14:54:04,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:04,897 INFO L470 AbstractCegarLoop]: Abstraction has 1541 states and 5143 transitions. [2022-01-28 14:54:04,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:04,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 5143 transitions. [2022-01-28 14:54:04,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:04,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:04,899 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:04,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-01-28 14:54:05,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:05,099 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:05,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:05,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2131722677, now seen corresponding path program 157 times [2022-01-28 14:54:05,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:05,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202734035] [2022-01-28 14:54:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:05,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:05,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:05,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202734035] [2022-01-28 14:54:05,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202734035] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:05,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495449573] [2022-01-28 14:54:05,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:54:05,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:05,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:05,293 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:05,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-01-28 14:54:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:05,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:54:05,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:05,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:54:05,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:05,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:54:05,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:05,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:54:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:05,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:06,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:06,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:54:06,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:06,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:54:06,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:06,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:54:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:06,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495449573] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:06,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:06,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:54:06,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114369150] [2022-01-28 14:54:06,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:06,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:54:06,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:06,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:54:06,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:06,337 INFO L87 Difference]: Start difference. First operand 1541 states and 5143 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:07,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:07,427 INFO L93 Difference]: Finished difference Result 1762 states and 5741 transitions. [2022-01-28 14:54:07,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:54:07,427 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:07,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:07,431 INFO L225 Difference]: With dead ends: 1762 [2022-01-28 14:54:07,431 INFO L226 Difference]: Without dead ends: 1661 [2022-01-28 14:54:07,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:54:07,431 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 124 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:07,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 234 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 841 Invalid, 0 Unknown, 7 Unchecked, 0.3s Time] [2022-01-28 14:54:07,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2022-01-28 14:54:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1541. [2022-01-28 14:54:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1540 states have (on average 3.3396103896103897) internal successors, (5143), 1540 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:07,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 5143 transitions. [2022-01-28 14:54:07,449 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 5143 transitions. Word has length 24 [2022-01-28 14:54:07,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:07,449 INFO L470 AbstractCegarLoop]: Abstraction has 1541 states and 5143 transitions. [2022-01-28 14:54:07,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:07,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 5143 transitions. [2022-01-28 14:54:07,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:07,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:07,451 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:07,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-01-28 14:54:07,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-01-28 14:54:07,652 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:07,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:07,652 INFO L85 PathProgramCache]: Analyzing trace with hash 292506955, now seen corresponding path program 158 times [2022-01-28 14:54:07,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:07,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413208771] [2022-01-28 14:54:07,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:07,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:54:07,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:07,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413208771] [2022-01-28 14:54:07,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413208771] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:07,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711479802] [2022-01-28 14:54:07,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:54:07,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:07,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:07,854 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:07,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-01-28 14:54:07,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:54:07,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:07,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:54:07,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:07,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:54:08,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:08,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:54:08,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:08,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:54:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:54:08,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:08,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:08,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2022-01-28 14:54:09,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:09,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-01-28 14:54:09,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:09,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-01-28 14:54:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:54:09,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711479802] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:09,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:09,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:54:09,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666578294] [2022-01-28 14:54:09,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:09,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:54:09,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:09,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:54:09,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:09,092 INFO L87 Difference]: Start difference. First operand 1541 states and 5143 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:10,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:10,294 INFO L93 Difference]: Finished difference Result 2254 states and 7023 transitions. [2022-01-28 14:54:10,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:54:10,294 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:10,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:10,298 INFO L225 Difference]: With dead ends: 2254 [2022-01-28 14:54:10,298 INFO L226 Difference]: Without dead ends: 2101 [2022-01-28 14:54:10,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:54:10,298 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 139 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:10,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 429 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1302 Invalid, 0 Unknown, 7 Unchecked, 0.5s Time] [2022-01-28 14:54:10,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2022-01-28 14:54:10,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 1546. [2022-01-28 14:54:10,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 3.3462783171521036) internal successors, (5170), 1545 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 5170 transitions. [2022-01-28 14:54:10,322 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 5170 transitions. Word has length 24 [2022-01-28 14:54:10,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:10,322 INFO L470 AbstractCegarLoop]: Abstraction has 1546 states and 5170 transitions. [2022-01-28 14:54:10,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:10,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 5170 transitions. [2022-01-28 14:54:10,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:10,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:10,325 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:10,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-01-28 14:54:10,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:10,527 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:10,528 INFO L85 PathProgramCache]: Analyzing trace with hash 279504387, now seen corresponding path program 159 times [2022-01-28 14:54:10,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:10,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99021596] [2022-01-28 14:54:10,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:10,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:10,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:10,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99021596] [2022-01-28 14:54:10,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99021596] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:10,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656551866] [2022-01-28 14:54:10,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:54:10,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:10,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:10,710 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:10,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-01-28 14:54:10,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:54:10,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:10,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:54:10,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:10,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:54:10,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:10,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:10,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:10,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:54:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:10,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:11,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:11,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:54:11,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:11,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:54:11,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:11,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:54:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:11,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656551866] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:11,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:11,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:54:11,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856725781] [2022-01-28 14:54:11,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:11,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:54:11,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:11,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:54:11,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:11,703 INFO L87 Difference]: Start difference. First operand 1546 states and 5170 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:12,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:12,055 INFO L93 Difference]: Finished difference Result 1618 states and 5370 transitions. [2022-01-28 14:54:12,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:54:12,055 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:12,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:12,058 INFO L225 Difference]: With dead ends: 1618 [2022-01-28 14:54:12,058 INFO L226 Difference]: Without dead ends: 1599 [2022-01-28 14:54:12,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:54:12,058 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 59 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:12,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 246 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 841 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2022-01-28 14:54:12,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2022-01-28 14:54:12,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1543. [2022-01-28 14:54:12,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 1542 states have (on average 3.3378728923476007) internal successors, (5147), 1542 states have internal predecessors, (5147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:12,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 5147 transitions. [2022-01-28 14:54:12,088 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 5147 transitions. Word has length 24 [2022-01-28 14:54:12,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:12,088 INFO L470 AbstractCegarLoop]: Abstraction has 1543 states and 5147 transitions. [2022-01-28 14:54:12,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:12,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 5147 transitions. [2022-01-28 14:54:12,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:12,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:12,090 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:12,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-01-28 14:54:12,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:12,290 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:12,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:12,291 INFO L85 PathProgramCache]: Analyzing trace with hash 916800473, now seen corresponding path program 160 times [2022-01-28 14:54:12,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:12,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668737232] [2022-01-28 14:54:12,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:12,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:54:12,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:12,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668737232] [2022-01-28 14:54:12,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668737232] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:12,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801369832] [2022-01-28 14:54:12,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:54:12,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:12,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:12,423 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:12,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-01-28 14:54:12,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:54:12,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:12,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:54:12,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:12,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:54:12,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:54:12,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:54:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:54:12,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:12,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:12,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:54:13,177 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:13,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:54:13,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:13,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:54:13,220 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:54:13,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801369832] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:13,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:13,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:54:13,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824401720] [2022-01-28 14:54:13,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:13,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:13,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:13,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:13,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:13,221 INFO L87 Difference]: Start difference. First operand 1543 states and 5147 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:13,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:13,709 INFO L93 Difference]: Finished difference Result 1680 states and 5567 transitions. [2022-01-28 14:54:13,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:54:13,710 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:13,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:13,713 INFO L225 Difference]: With dead ends: 1680 [2022-01-28 14:54:13,713 INFO L226 Difference]: Without dead ends: 1661 [2022-01-28 14:54:13,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:54:13,713 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:13,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 223 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:54:13,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2022-01-28 14:54:13,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1541. [2022-01-28 14:54:13,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1540 states have (on average 3.3376623376623376) internal successors, (5140), 1540 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:13,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 5140 transitions. [2022-01-28 14:54:13,731 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 5140 transitions. Word has length 24 [2022-01-28 14:54:13,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:13,731 INFO L470 AbstractCegarLoop]: Abstraction has 1541 states and 5140 transitions. [2022-01-28 14:54:13,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:13,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 5140 transitions. [2022-01-28 14:54:13,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:13,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:13,733 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:13,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-01-28 14:54:13,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:13,933 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:13,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:13,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1130554471, now seen corresponding path program 161 times [2022-01-28 14:54:13,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:13,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489332276] [2022-01-28 14:54:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:13,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:54:14,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:14,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489332276] [2022-01-28 14:54:14,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489332276] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:14,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647670887] [2022-01-28 14:54:14,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:54:14,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:14,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:14,070 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:14,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-01-28 14:54:14,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:54:14,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:14,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:54:14,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:14,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:54:14,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:14,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:54:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:54:14,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:14,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:14,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:54:14,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:14,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:54:14,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:14,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:54:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:54:14,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647670887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:14,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:14,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:54:14,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383682540] [2022-01-28 14:54:14,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:14,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:14,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:14,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:14,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:14,977 INFO L87 Difference]: Start difference. First operand 1541 states and 5140 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:15,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:15,361 INFO L93 Difference]: Finished difference Result 1672 states and 5512 transitions. [2022-01-28 14:54:15,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:54:15,362 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:15,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:15,364 INFO L225 Difference]: With dead ends: 1672 [2022-01-28 14:54:15,364 INFO L226 Difference]: Without dead ends: 1635 [2022-01-28 14:54:15,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:54:15,365 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:15,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 211 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:54:15,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2022-01-28 14:54:15,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1538. [2022-01-28 14:54:15,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.335718932986337) internal successors, (5127), 1537 states have internal predecessors, (5127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5127 transitions. [2022-01-28 14:54:15,383 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5127 transitions. Word has length 24 [2022-01-28 14:54:15,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:15,383 INFO L470 AbstractCegarLoop]: Abstraction has 1538 states and 5127 transitions. [2022-01-28 14:54:15,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:15,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5127 transitions. [2022-01-28 14:54:15,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:15,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:15,385 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:15,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-01-28 14:54:15,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:15,585 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:15,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:15,586 INFO L85 PathProgramCache]: Analyzing trace with hash -415402801, now seen corresponding path program 162 times [2022-01-28 14:54:15,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:15,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134929105] [2022-01-28 14:54:15,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:15,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:15,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:15,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134929105] [2022-01-28 14:54:15,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134929105] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:15,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787190991] [2022-01-28 14:54:15,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:54:15,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:15,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:15,741 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:15,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-01-28 14:54:15,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:54:15,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:15,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:54:15,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:15,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:54:15,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:54:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:15,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:16,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:16,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:54:16,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:16,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:54:16,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:16,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:54:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:16,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787190991] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:16,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:16,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:54:16,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612599233] [2022-01-28 14:54:16,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:16,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:16,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:16,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:16,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:16,513 INFO L87 Difference]: Start difference. First operand 1538 states and 5127 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:17,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:17,021 INFO L93 Difference]: Finished difference Result 1874 states and 6056 transitions. [2022-01-28 14:54:17,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:54:17,022 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:17,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:17,025 INFO L225 Difference]: With dead ends: 1874 [2022-01-28 14:54:17,025 INFO L226 Difference]: Without dead ends: 1766 [2022-01-28 14:54:17,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:54:17,025 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 158 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:17,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 189 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:54:17,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2022-01-28 14:54:17,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1552. [2022-01-28 14:54:17,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 3.3417150225660865) internal successors, (5183), 1551 states have internal predecessors, (5183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:17,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 5183 transitions. [2022-01-28 14:54:17,045 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 5183 transitions. Word has length 24 [2022-01-28 14:54:17,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:17,045 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 5183 transitions. [2022-01-28 14:54:17,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:17,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 5183 transitions. [2022-01-28 14:54:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:17,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:17,047 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:17,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-01-28 14:54:17,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-01-28 14:54:17,248 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:17,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:17,248 INFO L85 PathProgramCache]: Analyzing trace with hash -997163581, now seen corresponding path program 163 times [2022-01-28 14:54:17,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:17,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565397371] [2022-01-28 14:54:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:17,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:17,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:17,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565397371] [2022-01-28 14:54:17,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565397371] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:17,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518202117] [2022-01-28 14:54:17,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:54:17,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:17,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:17,452 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:17,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-01-28 14:54:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:17,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:54:17,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:17,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:17,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:54:17,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:17,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:54:17,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:17,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-28 14:54:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:17,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:18,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:18,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2022-01-28 14:54:18,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:18,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-01-28 14:54:18,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:18,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-01-28 14:54:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:18,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518202117] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:18,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:18,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:54:18,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528013181] [2022-01-28 14:54:18,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:18,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:54:18,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:18,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:54:18,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:18,622 INFO L87 Difference]: Start difference. First operand 1552 states and 5183 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:19,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:19,951 INFO L93 Difference]: Finished difference Result 2188 states and 6785 transitions. [2022-01-28 14:54:19,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:54:19,951 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:19,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:19,954 INFO L225 Difference]: With dead ends: 2188 [2022-01-28 14:54:19,955 INFO L226 Difference]: Without dead ends: 1984 [2022-01-28 14:54:19,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 14:54:19,955 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 225 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:19,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 356 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 982 Invalid, 0 Unknown, 139 Unchecked, 0.4s Time] [2022-01-28 14:54:19,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2022-01-28 14:54:19,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1553. [2022-01-28 14:54:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1553 states, 1552 states have (on average 3.342139175257732) internal successors, (5187), 1552 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:19,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 5187 transitions. [2022-01-28 14:54:19,977 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 5187 transitions. Word has length 24 [2022-01-28 14:54:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:19,977 INFO L470 AbstractCegarLoop]: Abstraction has 1553 states and 5187 transitions. [2022-01-28 14:54:19,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 5187 transitions. [2022-01-28 14:54:19,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:19,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:19,979 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:19,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-01-28 14:54:20,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:20,179 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:20,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:20,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1112684295, now seen corresponding path program 164 times [2022-01-28 14:54:20,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:20,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577779102] [2022-01-28 14:54:20,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:20,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:20,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:20,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577779102] [2022-01-28 14:54:20,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577779102] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:20,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646956223] [2022-01-28 14:54:20,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:54:20,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:20,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:20,373 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:20,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-01-28 14:54:20,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:54:20,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:20,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:54:20,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:20,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:20,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:54:20,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:20,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:20,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:20,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:54:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:20,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:21,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:21,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2022-01-28 14:54:21,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:21,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-01-28 14:54:21,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:21,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-01-28 14:54:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:21,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646956223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:21,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:21,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:54:21,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970321112] [2022-01-28 14:54:21,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:21,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:54:21,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:21,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:54:21,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:21,514 INFO L87 Difference]: Start difference. First operand 1553 states and 5187 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:22,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:22,367 INFO L93 Difference]: Finished difference Result 1931 states and 6168 transitions. [2022-01-28 14:54:22,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:54:22,367 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:22,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:22,370 INFO L225 Difference]: With dead ends: 1931 [2022-01-28 14:54:22,370 INFO L226 Difference]: Without dead ends: 1778 [2022-01-28 14:54:22,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:54:22,371 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 145 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:22,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 333 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 870 Invalid, 0 Unknown, 300 Unchecked, 0.4s Time] [2022-01-28 14:54:22,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2022-01-28 14:54:22,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1560. [2022-01-28 14:54:22,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1559 states have (on average 3.3450930083386785) internal successors, (5215), 1559 states have internal predecessors, (5215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:22,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 5215 transitions. [2022-01-28 14:54:22,389 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 5215 transitions. Word has length 24 [2022-01-28 14:54:22,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:22,390 INFO L470 AbstractCegarLoop]: Abstraction has 1560 states and 5215 transitions. [2022-01-28 14:54:22,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:22,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 5215 transitions. [2022-01-28 14:54:22,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:22,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:22,392 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:22,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-01-28 14:54:22,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-01-28 14:54:22,592 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:22,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:22,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1633718827, now seen corresponding path program 165 times [2022-01-28 14:54:22,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:22,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344894240] [2022-01-28 14:54:22,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:22,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:22,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:22,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344894240] [2022-01-28 14:54:22,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344894240] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:22,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304073100] [2022-01-28 14:54:22,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:54:22,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:22,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:22,753 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:22,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-01-28 14:54:22,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:54:22,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:22,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:54:22,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:22,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:54:22,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:54:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:23,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:23,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:23,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:54:23,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:23,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-01-28 14:54:23,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:23,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-01-28 14:54:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:23,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304073100] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:23,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:23,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-01-28 14:54:23,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67362049] [2022-01-28 14:54:23,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:23,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:54:23,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:23,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:54:23,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:54:23,822 INFO L87 Difference]: Start difference. First operand 1560 states and 5215 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:24,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:24,371 INFO L93 Difference]: Finished difference Result 1869 states and 6015 transitions. [2022-01-28 14:54:24,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:54:24,371 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:24,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:24,374 INFO L225 Difference]: With dead ends: 1869 [2022-01-28 14:54:24,374 INFO L226 Difference]: Without dead ends: 1720 [2022-01-28 14:54:24,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:54:24,374 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 119 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:24,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 242 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:54:24,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2022-01-28 14:54:24,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 1568. [2022-01-28 14:54:24,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 3.338225909380983) internal successors, (5231), 1567 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:24,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 5231 transitions. [2022-01-28 14:54:24,392 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 5231 transitions. Word has length 24 [2022-01-28 14:54:24,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:24,392 INFO L470 AbstractCegarLoop]: Abstraction has 1568 states and 5231 transitions. [2022-01-28 14:54:24,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:24,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 5231 transitions. [2022-01-28 14:54:24,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:24,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:24,395 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:24,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-01-28 14:54:24,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:24,595 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:24,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:24,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1149316057, now seen corresponding path program 166 times [2022-01-28 14:54:24,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:24,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830219149] [2022-01-28 14:54:24,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:24,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:24,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:24,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830219149] [2022-01-28 14:54:24,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830219149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:24,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465519243] [2022-01-28 14:54:24,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:54:24,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:24,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:24,750 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:24,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-01-28 14:54:24,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:54:24,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:24,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:54:24,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:24,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:54:24,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:54:24,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:54:24,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:54:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:25,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:25,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:25,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:54:25,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:25,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-01-28 14:54:25,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:25,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-01-28 14:54:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:25,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465519243] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:25,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:25,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:54:25,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843095147] [2022-01-28 14:54:25,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:25,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:25,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:25,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:25,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:25,685 INFO L87 Difference]: Start difference. First operand 1568 states and 5231 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:26,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:26,686 INFO L93 Difference]: Finished difference Result 1971 states and 6275 transitions. [2022-01-28 14:54:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:54:26,687 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:26,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:26,690 INFO L225 Difference]: With dead ends: 1971 [2022-01-28 14:54:26,690 INFO L226 Difference]: Without dead ends: 1842 [2022-01-28 14:54:26,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:54:26,690 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 143 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:26,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 406 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:54:26,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2022-01-28 14:54:26,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1567. [2022-01-28 14:54:26,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1566 states have (on average 3.339719029374202) internal successors, (5230), 1566 states have internal predecessors, (5230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 5230 transitions. [2022-01-28 14:54:26,710 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 5230 transitions. Word has length 24 [2022-01-28 14:54:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:26,710 INFO L470 AbstractCegarLoop]: Abstraction has 1567 states and 5230 transitions. [2022-01-28 14:54:26,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:26,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 5230 transitions. [2022-01-28 14:54:26,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:26,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:26,712 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:26,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-01-28 14:54:26,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:26,913 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:26,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:26,913 INFO L85 PathProgramCache]: Analyzing trace with hash -577997105, now seen corresponding path program 167 times [2022-01-28 14:54:26,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:26,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244825320] [2022-01-28 14:54:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:26,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:27,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:27,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244825320] [2022-01-28 14:54:27,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244825320] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:27,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120341559] [2022-01-28 14:54:27,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:54:27,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:27,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:27,093 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:27,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-01-28 14:54:27,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 14:54:27,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:27,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:54:27,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:27,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:27,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:27,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:27,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:54:27,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:27,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-28 14:54:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:27,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:27,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:27,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 99 [2022-01-28 14:54:28,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:28,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2022-01-28 14:54:28,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:28,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2022-01-28 14:54:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:28,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120341559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:28,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:28,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:54:28,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722640874] [2022-01-28 14:54:28,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:28,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:54:28,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:28,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:54:28,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:54:28,181 INFO L87 Difference]: Start difference. First operand 1567 states and 5230 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:28,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:28,747 INFO L93 Difference]: Finished difference Result 1674 states and 5553 transitions. [2022-01-28 14:54:28,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:54:28,747 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:28,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:28,750 INFO L225 Difference]: With dead ends: 1674 [2022-01-28 14:54:28,750 INFO L226 Difference]: Without dead ends: 1635 [2022-01-28 14:54:28,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:54:28,750 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:28,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 248 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 783 Invalid, 0 Unknown, 35 Unchecked, 0.3s Time] [2022-01-28 14:54:28,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2022-01-28 14:54:28,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1575. [2022-01-28 14:54:28,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.3392630241423125) internal successors, (5256), 1574 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:28,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5256 transitions. [2022-01-28 14:54:28,770 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5256 transitions. Word has length 24 [2022-01-28 14:54:28,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:28,770 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5256 transitions. [2022-01-28 14:54:28,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:28,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5256 transitions. [2022-01-28 14:54:28,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:28,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:28,772 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:28,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-01-28 14:54:28,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-01-28 14:54:28,991 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:28,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:28,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1703905455, now seen corresponding path program 168 times [2022-01-28 14:54:28,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:28,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886150148] [2022-01-28 14:54:28,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:28,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:29,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:29,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886150148] [2022-01-28 14:54:29,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886150148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:29,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458431322] [2022-01-28 14:54:29,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:54:29,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:29,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:29,204 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:29,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-01-28 14:54:29,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:54:29,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:29,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:54:29,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:29,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:29,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:29,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:29,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:54:29,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:29,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 14:54:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:29,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:29,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:29,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 84 [2022-01-28 14:54:30,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:30,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 110 [2022-01-28 14:54:30,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:30,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 82 [2022-01-28 14:54:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:30,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458431322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:30,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:30,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:54:30,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318381514] [2022-01-28 14:54:30,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:30,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:54:30,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:30,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:54:30,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:30,295 INFO L87 Difference]: Start difference. First operand 1575 states and 5256 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:30,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:30,691 INFO L93 Difference]: Finished difference Result 1678 states and 5549 transitions. [2022-01-28 14:54:30,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:54:30,691 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:30,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:30,694 INFO L225 Difference]: With dead ends: 1678 [2022-01-28 14:54:30,694 INFO L226 Difference]: Without dead ends: 1639 [2022-01-28 14:54:30,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:54:30,694 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:30,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 248 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 632 Invalid, 0 Unknown, 59 Unchecked, 0.3s Time] [2022-01-28 14:54:30,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2022-01-28 14:54:30,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1573. [2022-01-28 14:54:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1573 states, 1572 states have (on average 3.339058524173028) internal successors, (5249), 1572 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:30,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 5249 transitions. [2022-01-28 14:54:30,712 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 5249 transitions. Word has length 24 [2022-01-28 14:54:30,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:30,712 INFO L470 AbstractCegarLoop]: Abstraction has 1573 states and 5249 transitions. [2022-01-28 14:54:30,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:30,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 5249 transitions. [2022-01-28 14:54:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:30,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:30,715 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:30,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-01-28 14:54:30,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:30,915 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:30,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:30,915 INFO L85 PathProgramCache]: Analyzing trace with hash -269446261, now seen corresponding path program 169 times [2022-01-28 14:54:30,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:30,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719871964] [2022-01-28 14:54:30,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:30,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:31,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:31,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719871964] [2022-01-28 14:54:31,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719871964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:31,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767524100] [2022-01-28 14:54:31,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:54:31,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:31,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:31,106 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:31,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-01-28 14:54:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:31,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:54:31,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:31,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:31,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:31,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:31,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:54:31,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:31,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:54:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:31,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:32,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:32,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 84 [2022-01-28 14:54:32,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:32,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 116 [2022-01-28 14:54:32,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:32,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 88 [2022-01-28 14:54:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:32,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767524100] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:32,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:32,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:54:32,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501450035] [2022-01-28 14:54:32,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:32,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:54:32,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:32,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:54:32,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:54:32,399 INFO L87 Difference]: Start difference. First operand 1573 states and 5249 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:32,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:32,681 INFO L93 Difference]: Finished difference Result 1699 states and 5596 transitions. [2022-01-28 14:54:32,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:54:32,682 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:32,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:32,685 INFO L225 Difference]: With dead ends: 1699 [2022-01-28 14:54:32,685 INFO L226 Difference]: Without dead ends: 1633 [2022-01-28 14:54:32,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:54:32,685 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 92 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:32,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 140 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 494 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-01-28 14:54:32,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2022-01-28 14:54:32,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1571. [2022-01-28 14:54:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 3.340127388535032) internal successors, (5244), 1570 states have internal predecessors, (5244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:32,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 5244 transitions. [2022-01-28 14:54:32,712 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 5244 transitions. Word has length 24 [2022-01-28 14:54:32,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:32,712 INFO L470 AbstractCegarLoop]: Abstraction has 1571 states and 5244 transitions. [2022-01-28 14:54:32,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:32,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 5244 transitions. [2022-01-28 14:54:32,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:32,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:32,714 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:32,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-01-28 14:54:32,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:32,915 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:32,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:32,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1992554091, now seen corresponding path program 170 times [2022-01-28 14:54:32,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:32,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184907770] [2022-01-28 14:54:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:32,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:33,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:33,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184907770] [2022-01-28 14:54:33,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184907770] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:33,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994675833] [2022-01-28 14:54:33,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:54:33,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:33,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:33,134 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:33,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-01-28 14:54:33,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:54:33,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:33,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:54:33,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:33,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:33,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:33,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:33,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:54:33,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:33,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-28 14:54:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:33,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:33,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:33,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:54:34,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:34,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 88 [2022-01-28 14:54:34,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:34,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 66 [2022-01-28 14:54:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:34,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994675833] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:34,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:34,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:54:34,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505651196] [2022-01-28 14:54:34,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:34,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:54:34,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:34,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:54:34,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:34,261 INFO L87 Difference]: Start difference. First operand 1571 states and 5244 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:34,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:34,791 INFO L93 Difference]: Finished difference Result 1735 states and 5657 transitions. [2022-01-28 14:54:34,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:54:34,791 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:34,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:34,794 INFO L225 Difference]: With dead ends: 1735 [2022-01-28 14:54:34,794 INFO L226 Difference]: Without dead ends: 1657 [2022-01-28 14:54:34,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:54:34,795 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 52 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:34,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 336 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 612 Invalid, 0 Unknown, 140 Unchecked, 0.2s Time] [2022-01-28 14:54:34,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2022-01-28 14:54:34,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1575. [2022-01-28 14:54:34,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.3405336721728083) internal successors, (5258), 1574 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5258 transitions. [2022-01-28 14:54:34,812 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5258 transitions. Word has length 24 [2022-01-28 14:54:34,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:34,812 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5258 transitions. [2022-01-28 14:54:34,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:34,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5258 transitions. [2022-01-28 14:54:34,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:34,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:34,814 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:34,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-01-28 14:54:35,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:35,015 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:35,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:35,015 INFO L85 PathProgramCache]: Analyzing trace with hash 894128687, now seen corresponding path program 171 times [2022-01-28 14:54:35,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:35,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109799000] [2022-01-28 14:54:35,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:35,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:35,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:35,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109799000] [2022-01-28 14:54:35,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109799000] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:35,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533949100] [2022-01-28 14:54:35,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:54:35,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:35,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:35,206 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:35,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-01-28 14:54:35,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:54:35,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:35,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:54:35,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:35,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:35,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:35,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:35,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:54:35,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:35,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 14:54:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:35,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:36,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:36,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:54:36,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:36,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 83 [2022-01-28 14:54:36,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:36,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 63 [2022-01-28 14:54:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:36,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533949100] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:36,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:36,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:54:36,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430401604] [2022-01-28 14:54:36,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:36,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:54:36,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:36,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:54:36,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:54:36,366 INFO L87 Difference]: Start difference. First operand 1575 states and 5258 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:37,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:37,273 INFO L93 Difference]: Finished difference Result 1862 states and 5953 transitions. [2022-01-28 14:54:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:54:37,274 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:37,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:37,277 INFO L225 Difference]: With dead ends: 1862 [2022-01-28 14:54:37,277 INFO L226 Difference]: Without dead ends: 1733 [2022-01-28 14:54:37,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 14:54:37,277 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:37,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 284 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 772 Invalid, 0 Unknown, 127 Unchecked, 0.3s Time] [2022-01-28 14:54:37,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2022-01-28 14:54:37,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1575. [2022-01-28 14:54:37,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.3405336721728083) internal successors, (5258), 1574 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:37,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5258 transitions. [2022-01-28 14:54:37,296 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5258 transitions. Word has length 24 [2022-01-28 14:54:37,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:37,296 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5258 transitions. [2022-01-28 14:54:37,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:37,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5258 transitions. [2022-01-28 14:54:37,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:37,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:37,298 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:37,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-01-28 14:54:37,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2022-01-28 14:54:37,499 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:37,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:37,499 INFO L85 PathProgramCache]: Analyzing trace with hash 135828057, now seen corresponding path program 172 times [2022-01-28 14:54:37,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:37,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585026608] [2022-01-28 14:54:37,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:37,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:37,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:37,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585026608] [2022-01-28 14:54:37,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585026608] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:37,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895114998] [2022-01-28 14:54:37,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:54:37,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:37,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:37,720 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:37,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-01-28 14:54:37,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:54:37,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:37,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:54:37,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:37,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:37,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:54:37,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:37,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:54:37,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:37,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:54:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:38,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:38,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:38,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2022-01-28 14:54:38,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:38,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 83 [2022-01-28 14:54:38,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:38,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 63 [2022-01-28 14:54:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:38,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895114998] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:38,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:38,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:54:38,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822517267] [2022-01-28 14:54:38,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:38,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:54:38,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:38,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:54:38,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:38,897 INFO L87 Difference]: Start difference. First operand 1575 states and 5258 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:40,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:40,614 INFO L93 Difference]: Finished difference Result 2288 states and 7088 transitions. [2022-01-28 14:54:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-28 14:54:40,615 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:40,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:40,618 INFO L225 Difference]: With dead ends: 2288 [2022-01-28 14:54:40,618 INFO L226 Difference]: Without dead ends: 2084 [2022-01-28 14:54:40,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=300, Invalid=1506, Unknown=0, NotChecked=0, Total=1806 [2022-01-28 14:54:40,619 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 264 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:40,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 348 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1086 Invalid, 0 Unknown, 51 Unchecked, 0.5s Time] [2022-01-28 14:54:40,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2022-01-28 14:54:40,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1579. [2022-01-28 14:54:40,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.340304182509506) internal successors, (5271), 1578 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:40,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5271 transitions. [2022-01-28 14:54:40,644 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5271 transitions. Word has length 24 [2022-01-28 14:54:40,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:40,644 INFO L470 AbstractCegarLoop]: Abstraction has 1579 states and 5271 transitions. [2022-01-28 14:54:40,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:40,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5271 transitions. [2022-01-28 14:54:40,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:40,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:40,646 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:40,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-01-28 14:54:40,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:40,847 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:40,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:40,847 INFO L85 PathProgramCache]: Analyzing trace with hash 20307343, now seen corresponding path program 173 times [2022-01-28 14:54:40,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:40,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35342333] [2022-01-28 14:54:40,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:40,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:41,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:41,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35342333] [2022-01-28 14:54:41,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35342333] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:41,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671172582] [2022-01-28 14:54:41,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:54:41,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:41,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:41,051 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:41,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-01-28 14:54:41,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 14:54:41,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:41,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:54:41,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:41,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:41,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:54:41,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:41,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:41,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:41,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:54:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:41,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:41,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:41,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2022-01-28 14:54:41,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:41,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 70 [2022-01-28 14:54:41,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:41,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 54 [2022-01-28 14:54:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:42,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671172582] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:42,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:42,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:54:42,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932276105] [2022-01-28 14:54:42,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:42,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:54:42,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:42,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:54:42,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:42,037 INFO L87 Difference]: Start difference. First operand 1579 states and 5271 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:42,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:42,907 INFO L93 Difference]: Finished difference Result 1805 states and 5870 transitions. [2022-01-28 14:54:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:54:42,908 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:42,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:42,911 INFO L225 Difference]: With dead ends: 1805 [2022-01-28 14:54:42,911 INFO L226 Difference]: Without dead ends: 1705 [2022-01-28 14:54:42,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 14:54:42,911 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 130 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:42,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 208 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 641 Invalid, 0 Unknown, 63 Unchecked, 0.3s Time] [2022-01-28 14:54:42,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2022-01-28 14:54:42,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1591. [2022-01-28 14:54:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.339622641509434) internal successors, (5310), 1590 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:42,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5310 transitions. [2022-01-28 14:54:42,929 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5310 transitions. Word has length 24 [2022-01-28 14:54:42,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:42,929 INFO L470 AbstractCegarLoop]: Abstraction has 1591 states and 5310 transitions. [2022-01-28 14:54:42,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5310 transitions. [2022-01-28 14:54:42,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:42,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:42,932 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:42,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-01-28 14:54:43,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:43,132 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:43,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:43,132 INFO L85 PathProgramCache]: Analyzing trace with hash -420500503, now seen corresponding path program 174 times [2022-01-28 14:54:43,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:43,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675546707] [2022-01-28 14:54:43,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:43,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:43,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:43,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675546707] [2022-01-28 14:54:43,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675546707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:43,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102339103] [2022-01-28 14:54:43,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:54:43,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:43,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:43,316 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:43,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-01-28 14:54:43,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:54:43,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:43,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:54:43,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:43,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:43,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:54:43,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:43,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:43,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:43,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:54:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:43,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:44,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:44,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2022-01-28 14:54:44,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:44,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 87 [2022-01-28 14:54:44,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:44,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 67 [2022-01-28 14:54:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:44,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102339103] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:44,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:44,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:54:44,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438585919] [2022-01-28 14:54:44,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:44,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:54:44,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:44,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:54:44,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:54:44,623 INFO L87 Difference]: Start difference. First operand 1591 states and 5310 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:45,313 INFO L93 Difference]: Finished difference Result 2210 states and 6936 transitions. [2022-01-28 14:54:45,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:54:45,313 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:45,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:45,316 INFO L225 Difference]: With dead ends: 2210 [2022-01-28 14:54:45,317 INFO L226 Difference]: Without dead ends: 2004 [2022-01-28 14:54:45,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:54:45,317 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 163 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:45,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 294 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 834 Invalid, 0 Unknown, 22 Unchecked, 0.4s Time] [2022-01-28 14:54:45,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2022-01-28 14:54:45,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1630. [2022-01-28 14:54:45,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.3499079189686927) internal successors, (5457), 1629 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:45,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5457 transitions. [2022-01-28 14:54:45,338 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5457 transitions. Word has length 24 [2022-01-28 14:54:45,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:45,339 INFO L470 AbstractCegarLoop]: Abstraction has 1630 states and 5457 transitions. [2022-01-28 14:54:45,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:45,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5457 transitions. [2022-01-28 14:54:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:45,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:45,341 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:45,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-01-28 14:54:45,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-01-28 14:54:45,541 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:45,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:45,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2099711637, now seen corresponding path program 175 times [2022-01-28 14:54:45,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:45,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823199254] [2022-01-28 14:54:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:45,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:45,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:45,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823199254] [2022-01-28 14:54:45,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823199254] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:45,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737517135] [2022-01-28 14:54:45,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:54:45,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:45,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:45,741 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:45,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-01-28 14:54:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:45,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:54:45,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:45,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:45,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:54:46,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:46,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:46,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:46,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:54:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:46,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:46,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:46,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:54:46,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:46,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 108 [2022-01-28 14:54:46,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:46,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 80 [2022-01-28 14:54:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:47,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737517135] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:47,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:47,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:54:47,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806654785] [2022-01-28 14:54:47,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:47,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:54:47,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:47,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:54:47,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:47,020 INFO L87 Difference]: Start difference. First operand 1630 states and 5457 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:47,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:47,301 INFO L93 Difference]: Finished difference Result 1675 states and 5552 transitions. [2022-01-28 14:54:47,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:54:47,301 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:47,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:47,304 INFO L225 Difference]: With dead ends: 1675 [2022-01-28 14:54:47,304 INFO L226 Difference]: Without dead ends: 1661 [2022-01-28 14:54:47,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:54:47,305 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:47,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 214 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 660 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-01-28 14:54:47,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2022-01-28 14:54:47,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1633. [2022-01-28 14:54:47,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1633 states, 1632 states have (on average 3.3480392156862746) internal successors, (5464), 1632 states have internal predecessors, (5464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 5464 transitions. [2022-01-28 14:54:47,323 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 5464 transitions. Word has length 24 [2022-01-28 14:54:47,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:47,323 INFO L470 AbstractCegarLoop]: Abstraction has 1633 states and 5464 transitions. [2022-01-28 14:54:47,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:47,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 5464 transitions. [2022-01-28 14:54:47,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:47,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:47,326 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:47,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-01-28 14:54:47,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-01-28 14:54:47,531 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:47,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:47,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1528256831, now seen corresponding path program 176 times [2022-01-28 14:54:47,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:47,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987258589] [2022-01-28 14:54:47,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:47,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:47,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:47,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987258589] [2022-01-28 14:54:47,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987258589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:47,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595184887] [2022-01-28 14:54:47,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:54:47,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:47,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:47,749 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:47,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-01-28 14:54:47,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:54:47,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:47,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:54:47,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:47,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:54:48,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:54:48,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:54:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:48,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:48,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:48,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:54:48,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:48,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 114 [2022-01-28 14:54:48,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:48,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 86 [2022-01-28 14:54:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:48,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595184887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:48,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:48,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:54:48,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084049203] [2022-01-28 14:54:48,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:48,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:54:48,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:48,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:54:48,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:54:48,946 INFO L87 Difference]: Start difference. First operand 1633 states and 5464 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:49,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:49,284 INFO L93 Difference]: Finished difference Result 1779 states and 5823 transitions. [2022-01-28 14:54:49,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:54:49,285 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:49,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:49,288 INFO L225 Difference]: With dead ends: 1779 [2022-01-28 14:54:49,288 INFO L226 Difference]: Without dead ends: 1717 [2022-01-28 14:54:49,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:49,288 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 77 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:49,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 196 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:54:49,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-01-28 14:54:49,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1618. [2022-01-28 14:54:49,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.354978354978355) internal successors, (5425), 1617 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:49,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5425 transitions. [2022-01-28 14:54:49,309 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5425 transitions. Word has length 24 [2022-01-28 14:54:49,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:49,309 INFO L470 AbstractCegarLoop]: Abstraction has 1618 states and 5425 transitions. [2022-01-28 14:54:49,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:49,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5425 transitions. [2022-01-28 14:54:49,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:49,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:49,312 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:49,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-01-28 14:54:49,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:49,527 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:49,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:49,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2012659601, now seen corresponding path program 177 times [2022-01-28 14:54:49,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:49,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804754500] [2022-01-28 14:54:49,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:49,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:49,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:49,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804754500] [2022-01-28 14:54:49,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804754500] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:49,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736220488] [2022-01-28 14:54:49,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:54:49,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:49,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:49,696 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:49,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-01-28 14:54:49,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:54:49,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:49,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:54:49,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:49,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:49,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:54:49,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:49,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:54:49,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:49,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-28 14:54:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:50,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:50,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:50,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 68 [2022-01-28 14:54:50,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:50,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 90 [2022-01-28 14:54:50,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:50,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 68 [2022-01-28 14:54:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:50,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736220488] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:50,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:50,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:54:50,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828462354] [2022-01-28 14:54:50,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:50,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:54:50,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:50,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:54:50,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:54:50,702 INFO L87 Difference]: Start difference. First operand 1618 states and 5425 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:51,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:51,386 INFO L93 Difference]: Finished difference Result 1903 states and 6111 transitions. [2022-01-28 14:54:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:54:51,386 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:51,389 INFO L225 Difference]: With dead ends: 1903 [2022-01-28 14:54:51,389 INFO L226 Difference]: Without dead ends: 1774 [2022-01-28 14:54:51,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:54:51,390 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 114 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:51,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 295 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 784 Invalid, 0 Unknown, 6 Unchecked, 0.3s Time] [2022-01-28 14:54:51,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1774 states. [2022-01-28 14:54:51,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1774 to 1616. [2022-01-28 14:54:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1615 states have (on average 3.3560371517027865) internal successors, (5420), 1615 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:51,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 5420 transitions. [2022-01-28 14:54:51,409 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 5420 transitions. Word has length 24 [2022-01-28 14:54:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:51,409 INFO L470 AbstractCegarLoop]: Abstraction has 1616 states and 5420 transitions. [2022-01-28 14:54:51,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:51,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 5420 transitions. [2022-01-28 14:54:51,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:51,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:51,411 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:51,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-01-28 14:54:51,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:51,611 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:51,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:51,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1680695765, now seen corresponding path program 178 times [2022-01-28 14:54:51,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:51,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745296898] [2022-01-28 14:54:51,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:51,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:51,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:51,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745296898] [2022-01-28 14:54:51,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745296898] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:51,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743811661] [2022-01-28 14:54:51,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:54:51,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:51,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:51,782 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:51,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-01-28 14:54:51,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:54:51,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:51,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:54:51,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:51,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-28 14:54:51,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:51,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:54:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:52,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:52,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:52,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2022-01-28 14:54:52,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:52,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 111 [2022-01-28 14:54:52,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:52,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 83 [2022-01-28 14:54:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:52,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743811661] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:52,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:52,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:54:52,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929462359] [2022-01-28 14:54:52,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:52,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:54:52,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:52,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:54:52,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:54:52,702 INFO L87 Difference]: Start difference. First operand 1616 states and 5420 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:53,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:53,077 INFO L93 Difference]: Finished difference Result 1717 states and 5718 transitions. [2022-01-28 14:54:53,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:54:53,077 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:53,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:53,080 INFO L225 Difference]: With dead ends: 1717 [2022-01-28 14:54:53,080 INFO L226 Difference]: Without dead ends: 1686 [2022-01-28 14:54:53,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:53,081 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 57 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:53,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 218 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:54:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2022-01-28 14:54:53,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1620. [2022-01-28 14:54:53,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.355775169857937) internal successors, (5433), 1619 states have internal predecessors, (5433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:53,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5433 transitions. [2022-01-28 14:54:53,112 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5433 transitions. Word has length 24 [2022-01-28 14:54:53,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:53,112 INFO L470 AbstractCegarLoop]: Abstraction has 1620 states and 5433 transitions. [2022-01-28 14:54:53,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:53,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5433 transitions. [2022-01-28 14:54:53,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:53,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:53,114 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:53,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-01-28 14:54:53,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:53,315 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:53,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:53,315 INFO L85 PathProgramCache]: Analyzing trace with hash -516762591, now seen corresponding path program 179 times [2022-01-28 14:54:53,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:53,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727642173] [2022-01-28 14:54:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:53,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:53,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:53,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727642173] [2022-01-28 14:54:53,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727642173] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:53,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603715863] [2022-01-28 14:54:53,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:54:53,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:53,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:53,455 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:53,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-01-28 14:54:53,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:54:53,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:53,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:54:53,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:53,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:53,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-28 14:54:53,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:53,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:54:53,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:53,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-28 14:54:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:53,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:54,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:54,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2022-01-28 14:54:54,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:54,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 114 [2022-01-28 14:54:54,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:54,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 86 [2022-01-28 14:54:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:54,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603715863] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:54,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:54,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:54:54,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425205881] [2022-01-28 14:54:54,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:54,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:54,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:54,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:54,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:54,467 INFO L87 Difference]: Start difference. First operand 1620 states and 5433 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:54,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:54,820 INFO L93 Difference]: Finished difference Result 1774 states and 5897 transitions. [2022-01-28 14:54:54,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:54:54,821 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:54,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:54,823 INFO L225 Difference]: With dead ends: 1774 [2022-01-28 14:54:54,824 INFO L226 Difference]: Without dead ends: 1739 [2022-01-28 14:54:54,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:54:54,824 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:54,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 229 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 835 Invalid, 0 Unknown, 2 Unchecked, 0.3s Time] [2022-01-28 14:54:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2022-01-28 14:54:54,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1622. [2022-01-28 14:54:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.3547193090684764) internal successors, (5438), 1621 states have internal predecessors, (5438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5438 transitions. [2022-01-28 14:54:54,843 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5438 transitions. Word has length 24 [2022-01-28 14:54:54,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:54,843 INFO L470 AbstractCegarLoop]: Abstraction has 1622 states and 5438 transitions. [2022-01-28 14:54:54,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5438 transitions. [2022-01-28 14:54:54,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:54,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:54,845 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:54,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-01-28 14:54:55,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-01-28 14:54:55,046 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:55,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:55,046 INFO L85 PathProgramCache]: Analyzing trace with hash 958854987, now seen corresponding path program 180 times [2022-01-28 14:54:55,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:55,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865647275] [2022-01-28 14:54:55,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:55,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:55,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:55,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865647275] [2022-01-28 14:54:55,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865647275] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:55,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751367721] [2022-01-28 14:54:55,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:54:55,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:55,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:55,208 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:55,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-01-28 14:54:55,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:54:55,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:55,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:54:55,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:55,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:55,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:54:55,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:55,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:54:55,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:55,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 14:54:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:55,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:55,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:55,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2022-01-28 14:54:56,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:56,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 111 [2022-01-28 14:54:56,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:56,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 83 [2022-01-28 14:54:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:56,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751367721] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:56,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:56,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:54:56,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116900266] [2022-01-28 14:54:56,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:56,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:56,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:56,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:56,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:56,234 INFO L87 Difference]: Start difference. First operand 1622 states and 5438 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:56,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:56,590 INFO L93 Difference]: Finished difference Result 1746 states and 5768 transitions. [2022-01-28 14:54:56,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:54:56,591 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:56,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:56,594 INFO L225 Difference]: With dead ends: 1746 [2022-01-28 14:54:56,594 INFO L226 Difference]: Without dead ends: 1672 [2022-01-28 14:54:56,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:56,594 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 61 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:56,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 212 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 745 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-01-28 14:54:56,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2022-01-28 14:54:56,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1622. [2022-01-28 14:54:56,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.3547193090684764) internal successors, (5438), 1621 states have internal predecessors, (5438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:56,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5438 transitions. [2022-01-28 14:54:56,613 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5438 transitions. Word has length 24 [2022-01-28 14:54:56,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:56,613 INFO L470 AbstractCegarLoop]: Abstraction has 1622 states and 5438 transitions. [2022-01-28 14:54:56,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:56,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5438 transitions. [2022-01-28 14:54:56,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:56,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:56,615 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:56,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-01-28 14:54:56,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:56,815 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:56,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:56,816 INFO L85 PathProgramCache]: Analyzing trace with hash -705554193, now seen corresponding path program 181 times [2022-01-28 14:54:56,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:56,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605981914] [2022-01-28 14:54:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:56,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:56,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:56,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605981914] [2022-01-28 14:54:56,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605981914] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:56,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011085742] [2022-01-28 14:54:56,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:54:56,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:56,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:56,988 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:56,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-01-28 14:54:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:57,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:54:57,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:57,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:57,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:54:57,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:57,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:57,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:57,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:54:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:57,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:57,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:57,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:54:58,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:58,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 111 [2022-01-28 14:54:58,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:58,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 83 [2022-01-28 14:54:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:58,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011085742] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:58,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:58,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:54:58,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83813651] [2022-01-28 14:54:58,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:58,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:54:58,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:58,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:54:58,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:58,123 INFO L87 Difference]: Start difference. First operand 1622 states and 5438 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:58,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:58,377 INFO L93 Difference]: Finished difference Result 1747 states and 5793 transitions. [2022-01-28 14:54:58,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:54:58,377 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:54:58,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:58,380 INFO L225 Difference]: With dead ends: 1747 [2022-01-28 14:54:58,380 INFO L226 Difference]: Without dead ends: 1716 [2022-01-28 14:54:58,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:58,380 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:58,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 203 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 592 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2022-01-28 14:54:58,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-01-28 14:54:58,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1622. [2022-01-28 14:54:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.3547193090684764) internal successors, (5438), 1621 states have internal predecessors, (5438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5438 transitions. [2022-01-28 14:54:58,399 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5438 transitions. Word has length 24 [2022-01-28 14:54:58,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:58,399 INFO L470 AbstractCegarLoop]: Abstraction has 1622 states and 5438 transitions. [2022-01-28 14:54:58,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:58,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5438 transitions. [2022-01-28 14:54:58,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:54:58,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:58,401 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:58,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-01-28 14:54:58,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2022-01-28 14:54:58,602 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:58,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:58,602 INFO L85 PathProgramCache]: Analyzing trace with hash 458378981, now seen corresponding path program 182 times [2022-01-28 14:54:58,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:58,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122797228] [2022-01-28 14:54:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:58,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:58,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:58,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122797228] [2022-01-28 14:54:58,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122797228] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:58,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520192457] [2022-01-28 14:54:58,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:54:58,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:58,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:58,759 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:54:58,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-01-28 14:54:58,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:54:58,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:58,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:54:58,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:58,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:54:58,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:54:58,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:54:58,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:54:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:59,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:59,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:59,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 68 [2022-01-28 14:54:59,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:59,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 90 [2022-01-28 14:54:59,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:59,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 68 [2022-01-28 14:54:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:54:59,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520192457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:59,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:59,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:54:59,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233458162] [2022-01-28 14:54:59,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:59,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:54:59,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:59,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:54:59,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:54:59,743 INFO L87 Difference]: Start difference. First operand 1622 states and 5438 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:00,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:00,649 INFO L93 Difference]: Finished difference Result 2252 states and 7118 transitions. [2022-01-28 14:55:00,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:55:00,650 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:00,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:00,653 INFO L225 Difference]: With dead ends: 2252 [2022-01-28 14:55:00,653 INFO L226 Difference]: Without dead ends: 2114 [2022-01-28 14:55:00,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:55:00,654 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 112 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:00,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 374 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:55:00,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2022-01-28 14:55:00,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1624. [2022-01-28 14:55:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 3.3555144793592113) internal successors, (5446), 1623 states have internal predecessors, (5446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 5446 transitions. [2022-01-28 14:55:00,676 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 5446 transitions. Word has length 24 [2022-01-28 14:55:00,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:00,676 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 5446 transitions. [2022-01-28 14:55:00,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:00,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 5446 transitions. [2022-01-28 14:55:00,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:00,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:00,678 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:00,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:00,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:00,879 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:00,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:00,879 INFO L85 PathProgramCache]: Analyzing trace with hash -397003349, now seen corresponding path program 183 times [2022-01-28 14:55:00,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:00,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640126225] [2022-01-28 14:55:00,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:00,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:01,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:01,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640126225] [2022-01-28 14:55:01,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640126225] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:01,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273219326] [2022-01-28 14:55:01,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:55:01,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:01,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:01,058 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:01,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-01-28 14:55:01,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:55:01,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:01,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:01,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:01,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:01,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:55:01,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:01,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:01,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:01,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:55:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:01,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:01,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:01,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 66 [2022-01-28 14:55:01,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:01,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 76 [2022-01-28 14:55:01,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:01,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 58 [2022-01-28 14:55:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:02,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273219326] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:02,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:02,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:02,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635804622] [2022-01-28 14:55:02,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:02,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:02,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:02,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:02,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:02,028 INFO L87 Difference]: Start difference. First operand 1624 states and 5446 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:02,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:02,487 INFO L93 Difference]: Finished difference Result 1819 states and 5945 transitions. [2022-01-28 14:55:02,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:55:02,488 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:02,490 INFO L225 Difference]: With dead ends: 1819 [2022-01-28 14:55:02,490 INFO L226 Difference]: Without dead ends: 1721 [2022-01-28 14:55:02,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:55:02,491 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 66 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:02,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 229 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 625 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-01-28 14:55:02,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-01-28 14:55:02,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1628. [2022-01-28 14:55:02,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1627 states have (on average 3.357098955132145) internal successors, (5462), 1627 states have internal predecessors, (5462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:02,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 5462 transitions. [2022-01-28 14:55:02,523 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 5462 transitions. Word has length 24 [2022-01-28 14:55:02,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:02,523 INFO L470 AbstractCegarLoop]: Abstraction has 1628 states and 5462 transitions. [2022-01-28 14:55:02,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:02,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 5462 transitions. [2022-01-28 14:55:02,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:02,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:02,525 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:02,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-01-28 14:55:02,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:02,726 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:02,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:02,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1942144789, now seen corresponding path program 184 times [2022-01-28 14:55:02,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:02,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250791184] [2022-01-28 14:55:02,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:02,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:02,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:02,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250791184] [2022-01-28 14:55:02,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250791184] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:02,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083493677] [2022-01-28 14:55:02,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:55:02,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:02,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:02,924 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:02,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-01-28 14:55:02,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:55:02,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:02,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:02,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:03,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:03,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:55:03,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:03,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:55:03,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:03,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:55:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:03,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:03,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:03,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:55:04,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:04,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 114 [2022-01-28 14:55:04,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:04,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 86 [2022-01-28 14:55:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:04,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083493677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:04,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:04,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:04,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905649139] [2022-01-28 14:55:04,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:04,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:04,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:04,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:04,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:04,202 INFO L87 Difference]: Start difference. First operand 1628 states and 5462 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:04,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:04,401 INFO L93 Difference]: Finished difference Result 1738 states and 5763 transitions. [2022-01-28 14:55:04,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:55:04,402 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:04,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:04,405 INFO L225 Difference]: With dead ends: 1738 [2022-01-28 14:55:04,405 INFO L226 Difference]: Without dead ends: 1723 [2022-01-28 14:55:04,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:04,405 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:04,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 192 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 473 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2022-01-28 14:55:04,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2022-01-28 14:55:04,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1630. [2022-01-28 14:55:04,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.357888275015347) internal successors, (5470), 1629 states have internal predecessors, (5470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5470 transitions. [2022-01-28 14:55:04,425 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5470 transitions. Word has length 24 [2022-01-28 14:55:04,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:04,425 INFO L470 AbstractCegarLoop]: Abstraction has 1630 states and 5470 transitions. [2022-01-28 14:55:04,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:04,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5470 transitions. [2022-01-28 14:55:04,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:04,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:04,427 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:04,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-01-28 14:55:04,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-01-28 14:55:04,627 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:04,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:04,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1599438891, now seen corresponding path program 185 times [2022-01-28 14:55:04,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:04,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926739775] [2022-01-28 14:55:04,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:04,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:04,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:04,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926739775] [2022-01-28 14:55:04,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926739775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:04,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893640715] [2022-01-28 14:55:04,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:55:04,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:04,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:04,825 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:04,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-01-28 14:55:04,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 14:55:04,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:04,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:04,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:04,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:55:04,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:04,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:55:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:05,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:05,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:05,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 66 [2022-01-28 14:55:05,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:05,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 71 [2022-01-28 14:55:05,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:05,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-01-28 14:55:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:05,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893640715] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:05,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:05,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:55:05,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701530995] [2022-01-28 14:55:05,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:05,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:55:05,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:05,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:55:05,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:55:05,697 INFO L87 Difference]: Start difference. First operand 1630 states and 5470 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:06,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:06,100 INFO L93 Difference]: Finished difference Result 1724 states and 5714 transitions. [2022-01-28 14:55:06,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:55:06,100 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:06,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:06,103 INFO L225 Difference]: With dead ends: 1724 [2022-01-28 14:55:06,103 INFO L226 Difference]: Without dead ends: 1689 [2022-01-28 14:55:06,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:55:06,103 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:06,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 181 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:55:06,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2022-01-28 14:55:06,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1624. [2022-01-28 14:55:06,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 3.3555144793592113) internal successors, (5446), 1623 states have internal predecessors, (5446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:06,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 5446 transitions. [2022-01-28 14:55:06,121 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 5446 transitions. Word has length 24 [2022-01-28 14:55:06,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:06,121 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 5446 transitions. [2022-01-28 14:55:06,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:06,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 5446 transitions. [2022-01-28 14:55:06,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:06,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:06,123 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:06,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-01-28 14:55:06,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-01-28 14:55:06,324 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:06,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:06,324 INFO L85 PathProgramCache]: Analyzing trace with hash -616234577, now seen corresponding path program 186 times [2022-01-28 14:55:06,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:06,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28758850] [2022-01-28 14:55:06,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:06,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:06,492 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:06,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:06,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28758850] [2022-01-28 14:55:06,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28758850] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:06,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108906312] [2022-01-28 14:55:06,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:55:06,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:06,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:06,493 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:06,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-01-28 14:55:06,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:55:06,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:06,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:55:06,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:06,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:55:06,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:06,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:55:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:06,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:07,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:07,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 68 [2022-01-28 14:55:07,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:07,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 90 [2022-01-28 14:55:07,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:07,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 68 [2022-01-28 14:55:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:07,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108906312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:07,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:07,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:55:07,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977104683] [2022-01-28 14:55:07,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:07,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:55:07,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:07,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:55:07,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:55:07,645 INFO L87 Difference]: Start difference. First operand 1624 states and 5446 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:09,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:09,220 INFO L93 Difference]: Finished difference Result 2316 states and 7222 transitions. [2022-01-28 14:55:09,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:55:09,220 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:09,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:09,224 INFO L225 Difference]: With dead ends: 2316 [2022-01-28 14:55:09,224 INFO L226 Difference]: Without dead ends: 2136 [2022-01-28 14:55:09,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:55:09,225 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 157 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:09,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 406 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:55:09,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2022-01-28 14:55:09,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 1636. [2022-01-28 14:55:09,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 3.3565749235474005) internal successors, (5488), 1635 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:09,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 5488 transitions. [2022-01-28 14:55:09,249 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 5488 transitions. Word has length 24 [2022-01-28 14:55:09,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:09,249 INFO L470 AbstractCegarLoop]: Abstraction has 1636 states and 5488 transitions. [2022-01-28 14:55:09,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:09,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 5488 transitions. [2022-01-28 14:55:09,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:09,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:09,251 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:09,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:09,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:09,452 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:09,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:09,452 INFO L85 PathProgramCache]: Analyzing trace with hash 742052065, now seen corresponding path program 187 times [2022-01-28 14:55:09,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:09,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971696233] [2022-01-28 14:55:09,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:09,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:09,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:09,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:09,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971696233] [2022-01-28 14:55:09,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971696233] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:09,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050817329] [2022-01-28 14:55:09,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:55:09,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:09,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:09,669 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:09,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-01-28 14:55:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:09,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:09,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:09,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:09,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:55:09,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:09,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:55:09,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:09,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:55:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:09,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:10,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:10,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:55:10,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:10,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 108 [2022-01-28 14:55:10,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:10,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 80 [2022-01-28 14:55:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:10,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050817329] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:10,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:10,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:10,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466284648] [2022-01-28 14:55:10,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:10,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:10,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:10,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:10,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:10,764 INFO L87 Difference]: Start difference. First operand 1636 states and 5488 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:11,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:11,753 INFO L93 Difference]: Finished difference Result 1847 states and 6025 transitions. [2022-01-28 14:55:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:55:11,753 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:11,757 INFO L225 Difference]: With dead ends: 1847 [2022-01-28 14:55:11,757 INFO L226 Difference]: Without dead ends: 1746 [2022-01-28 14:55:11,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:55:11,757 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 124 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:11,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 271 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 873 Invalid, 0 Unknown, 4 Unchecked, 0.3s Time] [2022-01-28 14:55:11,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2022-01-28 14:55:11,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1636. [2022-01-28 14:55:11,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 3.3565749235474005) internal successors, (5488), 1635 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 5488 transitions. [2022-01-28 14:55:11,776 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 5488 transitions. Word has length 24 [2022-01-28 14:55:11,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:11,776 INFO L470 AbstractCegarLoop]: Abstraction has 1636 states and 5488 transitions. [2022-01-28 14:55:11,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:11,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 5488 transitions. [2022-01-28 14:55:11,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:11,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:11,779 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:11,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:11,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-01-28 14:55:11,979 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:11,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:11,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1128685599, now seen corresponding path program 188 times [2022-01-28 14:55:11,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:11,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547564115] [2022-01-28 14:55:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:11,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:55:12,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:12,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547564115] [2022-01-28 14:55:12,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547564115] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:12,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80562526] [2022-01-28 14:55:12,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:55:12,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:12,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:12,215 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:12,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-01-28 14:55:12,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:55:12,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:12,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:12,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:12,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:12,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:55:12,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:12,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:55:12,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:12,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-28 14:55:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:55:12,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:13,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:13,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2022-01-28 14:55:13,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:13,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2022-01-28 14:55:13,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:13,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2022-01-28 14:55:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:55:13,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80562526] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:13,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:13,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:13,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324873674] [2022-01-28 14:55:13,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:13,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:13,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:13,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:13,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:13,389 INFO L87 Difference]: Start difference. First operand 1636 states and 5488 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:13,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:13,771 INFO L93 Difference]: Finished difference Result 1744 states and 5774 transitions. [2022-01-28 14:55:13,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:55:13,771 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:13,774 INFO L225 Difference]: With dead ends: 1744 [2022-01-28 14:55:13,774 INFO L226 Difference]: Without dead ends: 1706 [2022-01-28 14:55:13,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:55:13,775 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 81 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:13,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 202 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 723 Invalid, 0 Unknown, 4 Unchecked, 0.3s Time] [2022-01-28 14:55:13,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2022-01-28 14:55:13,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1636. [2022-01-28 14:55:13,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 3.3565749235474005) internal successors, (5488), 1635 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:13,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 5488 transitions. [2022-01-28 14:55:13,794 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 5488 transitions. Word has length 24 [2022-01-28 14:55:13,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:13,794 INFO L470 AbstractCegarLoop]: Abstraction has 1636 states and 5488 transitions. [2022-01-28 14:55:13,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:13,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 5488 transitions. [2022-01-28 14:55:13,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:13,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:13,796 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:13,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-01-28 14:55:13,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:13,996 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:13,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:13,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1162785999, now seen corresponding path program 189 times [2022-01-28 14:55:13,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:13,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49983302] [2022-01-28 14:55:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:13,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:14,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:14,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49983302] [2022-01-28 14:55:14,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49983302] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:14,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59687065] [2022-01-28 14:55:14,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:55:14,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:14,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:14,157 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:14,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-01-28 14:55:14,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:55:14,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:14,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:14,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:14,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:14,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:55:14,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 14:55:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:14,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:14,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:14,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:55:15,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:15,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 114 [2022-01-28 14:55:15,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:15,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 86 [2022-01-28 14:55:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:15,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59687065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:15,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:15,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:55:15,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156214895] [2022-01-28 14:55:15,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:15,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:55:15,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:15,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:55:15,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:55:15,250 INFO L87 Difference]: Start difference. First operand 1636 states and 5488 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:15,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:15,869 INFO L93 Difference]: Finished difference Result 1758 states and 5847 transitions. [2022-01-28 14:55:15,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:55:15,869 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:15,872 INFO L225 Difference]: With dead ends: 1758 [2022-01-28 14:55:15,872 INFO L226 Difference]: Without dead ends: 1719 [2022-01-28 14:55:15,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:55:15,874 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 75 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:15,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 289 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:55:15,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-01-28 14:55:15,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1639. [2022-01-28 14:55:15,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1638 states have (on average 3.3565323565323566) internal successors, (5498), 1638 states have internal predecessors, (5498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:15,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 5498 transitions. [2022-01-28 14:55:15,895 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 5498 transitions. Word has length 24 [2022-01-28 14:55:15,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:15,895 INFO L470 AbstractCegarLoop]: Abstraction has 1639 states and 5498 transitions. [2022-01-28 14:55:15,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:15,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 5498 transitions. [2022-01-28 14:55:15,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:15,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:15,898 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:15,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-01-28 14:55:16,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-01-28 14:55:16,098 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:16,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:16,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1471336843, now seen corresponding path program 190 times [2022-01-28 14:55:16,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:16,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139065488] [2022-01-28 14:55:16,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:16,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:16,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:16,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139065488] [2022-01-28 14:55:16,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139065488] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:16,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980610665] [2022-01-28 14:55:16,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:55:16,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:16,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:16,326 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:16,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-01-28 14:55:16,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:55:16,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:16,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:55:16,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:16,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:16,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:16,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:16,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:55:16,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:16,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:55:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:16,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:17,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:17,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:55:17,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:17,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 88 [2022-01-28 14:55:17,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:17,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 66 [2022-01-28 14:55:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:17,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980610665] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:17,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:17,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:17,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593962771] [2022-01-28 14:55:17,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:17,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:17,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:17,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:17,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:17,695 INFO L87 Difference]: Start difference. First operand 1639 states and 5498 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:18,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:18,831 INFO L93 Difference]: Finished difference Result 2122 states and 6751 transitions. [2022-01-28 14:55:18,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:55:18,831 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:18,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:18,835 INFO L225 Difference]: With dead ends: 2122 [2022-01-28 14:55:18,835 INFO L226 Difference]: Without dead ends: 2011 [2022-01-28 14:55:18,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2022-01-28 14:55:18,835 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 185 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:18,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 293 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 835 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2022-01-28 14:55:18,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2022-01-28 14:55:18,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1641. [2022-01-28 14:55:18,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1640 states have (on average 3.3585365853658535) internal successors, (5508), 1640 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:18,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 5508 transitions. [2022-01-28 14:55:18,857 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 5508 transitions. Word has length 24 [2022-01-28 14:55:18,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:18,857 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 5508 transitions. [2022-01-28 14:55:18,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:18,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 5508 transitions. [2022-01-28 14:55:18,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:18,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:18,859 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:18,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:19,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:19,060 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:19,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:19,060 INFO L85 PathProgramCache]: Analyzing trace with hash 898412079, now seen corresponding path program 191 times [2022-01-28 14:55:19,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:19,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793221666] [2022-01-28 14:55:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:19,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:19,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:19,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793221666] [2022-01-28 14:55:19,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793221666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:19,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551342669] [2022-01-28 14:55:19,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:55:19,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:19,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:19,291 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:19,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-01-28 14:55:19,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:55:19,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:19,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:19,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:19,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:19,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:19,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:19,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:55:19,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:19,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:55:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:19,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:20,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:20,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:55:20,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:20,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 108 [2022-01-28 14:55:20,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:20,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 80 [2022-01-28 14:55:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:20,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551342669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:20,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:20,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:55:20,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844811881] [2022-01-28 14:55:20,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:20,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:55:20,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:20,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:55:20,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:55:20,411 INFO L87 Difference]: Start difference. First operand 1641 states and 5508 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:20,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:20,888 INFO L93 Difference]: Finished difference Result 1825 states and 5980 transitions. [2022-01-28 14:55:20,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:55:20,888 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:20,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:20,891 INFO L225 Difference]: With dead ends: 1825 [2022-01-28 14:55:20,891 INFO L226 Difference]: Without dead ends: 1740 [2022-01-28 14:55:20,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:55:20,891 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 89 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:20,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 236 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 629 Invalid, 0 Unknown, 36 Unchecked, 0.3s Time] [2022-01-28 14:55:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2022-01-28 14:55:20,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1641. [2022-01-28 14:55:20,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1640 states have (on average 3.3585365853658535) internal successors, (5508), 1640 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:20,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 5508 transitions. [2022-01-28 14:55:20,911 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 5508 transitions. Word has length 24 [2022-01-28 14:55:20,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:20,911 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 5508 transitions. [2022-01-28 14:55:20,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:20,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 5508 transitions. [2022-01-28 14:55:20,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:20,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:20,914 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:20,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-01-28 14:55:21,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:21,114 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:21,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:21,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1976794251, now seen corresponding path program 192 times [2022-01-28 14:55:21,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:21,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390855000] [2022-01-28 14:55:21,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:21,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:21,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:21,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390855000] [2022-01-28 14:55:21,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390855000] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:21,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587019573] [2022-01-28 14:55:21,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:55:21,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:21,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:21,375 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:21,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-01-28 14:55:21,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-28 14:55:21,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:21,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:21,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:21,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:21,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:21,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:21,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:55:21,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:21,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:55:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:21,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:22,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:22,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 99 [2022-01-28 14:55:22,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:22,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2022-01-28 14:55:22,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:22,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2022-01-28 14:55:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:22,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587019573] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:22,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:22,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:22,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090493348] [2022-01-28 14:55:22,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:22,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:22,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:22,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:22,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:22,613 INFO L87 Difference]: Start difference. First operand 1641 states and 5508 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:23,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:23,042 INFO L93 Difference]: Finished difference Result 1735 states and 5757 transitions. [2022-01-28 14:55:23,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:55:23,042 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:23,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:23,045 INFO L225 Difference]: With dead ends: 1735 [2022-01-28 14:55:23,045 INFO L226 Difference]: Without dead ends: 1704 [2022-01-28 14:55:23,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:55:23,046 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:23,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 246 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 810 Invalid, 0 Unknown, 136 Unchecked, 0.3s Time] [2022-01-28 14:55:23,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2022-01-28 14:55:23,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1640. [2022-01-28 14:55:23,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.357535082367297) internal successors, (5503), 1639 states have internal predecessors, (5503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:23,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5503 transitions. [2022-01-28 14:55:23,065 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5503 transitions. Word has length 24 [2022-01-28 14:55:23,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:23,065 INFO L470 AbstractCegarLoop]: Abstraction has 1640 states and 5503 transitions. [2022-01-28 14:55:23,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:23,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5503 transitions. [2022-01-28 14:55:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:23,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:23,067 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:23,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:23,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:23,267 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:23,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:23,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1660055505, now seen corresponding path program 193 times [2022-01-28 14:55:23,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:23,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768730553] [2022-01-28 14:55:23,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:23,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:23,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:23,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:23,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768730553] [2022-01-28 14:55:23,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768730553] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:23,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049752388] [2022-01-28 14:55:23,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:55:23,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:23,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:23,462 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:23,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-01-28 14:55:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:23,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:55:23,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:23,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:23,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:23,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:23,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:55:23,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:23,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-28 14:55:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:23,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:24,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:24,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:55:24,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:24,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 83 [2022-01-28 14:55:24,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:24,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 63 [2022-01-28 14:55:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:24,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049752388] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:24,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:24,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:24,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786979108] [2022-01-28 14:55:24,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:24,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:24,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:24,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:24,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:24,582 INFO L87 Difference]: Start difference. First operand 1640 states and 5503 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:25,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:25,557 INFO L93 Difference]: Finished difference Result 1965 states and 6269 transitions. [2022-01-28 14:55:25,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:55:25,557 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:25,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:25,560 INFO L225 Difference]: With dead ends: 1965 [2022-01-28 14:55:25,560 INFO L226 Difference]: Without dead ends: 1836 [2022-01-28 14:55:25,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2022-01-28 14:55:25,561 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 126 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:25,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 255 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 637 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2022-01-28 14:55:25,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2022-01-28 14:55:25,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1644. [2022-01-28 14:55:25,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 3.3566646378575777) internal successors, (5515), 1643 states have internal predecessors, (5515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:25,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 5515 transitions. [2022-01-28 14:55:25,593 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 5515 transitions. Word has length 24 [2022-01-28 14:55:25,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:25,593 INFO L470 AbstractCegarLoop]: Abstraction has 1644 states and 5515 transitions. [2022-01-28 14:55:25,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:25,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 5515 transitions. [2022-01-28 14:55:25,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:25,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:25,596 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:25,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-01-28 14:55:25,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2022-01-28 14:55:25,796 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:25,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:25,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1443307217, now seen corresponding path program 194 times [2022-01-28 14:55:25,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:25,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125725104] [2022-01-28 14:55:25,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:25,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:55:25,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:25,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125725104] [2022-01-28 14:55:25,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125725104] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:25,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847911158] [2022-01-28 14:55:25,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:55:25,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:25,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:25,968 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:25,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-01-28 14:55:25,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:55:25,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:25,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:55:25,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:26,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:26,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:26,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:26,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:55:26,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:26,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-28 14:55:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:55:26,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:26,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:26,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:55:27,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:27,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 88 [2022-01-28 14:55:27,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:27,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 66 [2022-01-28 14:55:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:55:27,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847911158] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:27,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:27,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:55:27,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695886269] [2022-01-28 14:55:27,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:27,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:55:27,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:27,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:55:27,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:55:27,235 INFO L87 Difference]: Start difference. First operand 1644 states and 5515 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:27,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:27,825 INFO L93 Difference]: Finished difference Result 1805 states and 5886 transitions. [2022-01-28 14:55:27,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:55:27,825 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:27,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:27,828 INFO L225 Difference]: With dead ends: 1805 [2022-01-28 14:55:27,828 INFO L226 Difference]: Without dead ends: 1752 [2022-01-28 14:55:27,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:55:27,829 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 64 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:27,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 268 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 803 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-01-28 14:55:27,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2022-01-28 14:55:27,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1640. [2022-01-28 14:55:27,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.3587553386211106) internal successors, (5505), 1639 states have internal predecessors, (5505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:27,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5505 transitions. [2022-01-28 14:55:27,849 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5505 transitions. Word has length 24 [2022-01-28 14:55:27,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:27,849 INFO L470 AbstractCegarLoop]: Abstraction has 1640 states and 5505 transitions. [2022-01-28 14:55:27,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:27,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5505 transitions. [2022-01-28 14:55:27,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:27,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:27,851 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:27,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:28,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2022-01-28 14:55:28,052 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:28,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:28,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1026952223, now seen corresponding path program 195 times [2022-01-28 14:55:28,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:28,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050572028] [2022-01-28 14:55:28,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:28,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:28,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:28,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050572028] [2022-01-28 14:55:28,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050572028] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:28,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045534106] [2022-01-28 14:55:28,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:55:28,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:28,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:28,223 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:28,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-01-28 14:55:28,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:55:28,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:28,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:55:28,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:28,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:55:28,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:28,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:55:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:28,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:28,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:28,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:55:29,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:29,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-01-28 14:55:29,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:29,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-01-28 14:55:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:29,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045534106] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:29,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:29,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:55:29,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215228648] [2022-01-28 14:55:29,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:29,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:55:29,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:29,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:55:29,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:55:29,087 INFO L87 Difference]: Start difference. First operand 1640 states and 5505 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:29,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:29,849 INFO L93 Difference]: Finished difference Result 1898 states and 6198 transitions. [2022-01-28 14:55:29,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:55:29,849 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:29,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:29,852 INFO L225 Difference]: With dead ends: 1898 [2022-01-28 14:55:29,852 INFO L226 Difference]: Without dead ends: 1781 [2022-01-28 14:55:29,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:55:29,852 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 121 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:29,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 207 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:55:29,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2022-01-28 14:55:29,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1646. [2022-01-28 14:55:29,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1645 states have (on average 3.358662613981763) internal successors, (5525), 1645 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:29,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 5525 transitions. [2022-01-28 14:55:29,872 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 5525 transitions. Word has length 24 [2022-01-28 14:55:29,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:29,872 INFO L470 AbstractCegarLoop]: Abstraction has 1646 states and 5525 transitions. [2022-01-28 14:55:29,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:29,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 5525 transitions. [2022-01-28 14:55:29,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:29,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:29,874 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:29,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:30,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-01-28 14:55:30,074 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:30,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:30,075 INFO L85 PathProgramCache]: Analyzing trace with hash 136980951, now seen corresponding path program 196 times [2022-01-28 14:55:30,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:30,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312629918] [2022-01-28 14:55:30,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:30,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:30,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:30,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312629918] [2022-01-28 14:55:30,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312629918] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:30,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886390133] [2022-01-28 14:55:30,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:55:30,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:30,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:30,235 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:30,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-01-28 14:55:30,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:55:30,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:30,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:30,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:30,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:30,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:55:30,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:30,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:55:30,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:30,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:55:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:30,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:31,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:31,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:55:31,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:31,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:55:31,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:31,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:55:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:31,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886390133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:31,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:31,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:55:31,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142589700] [2022-01-28 14:55:31,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:31,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:55:31,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:31,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:55:31,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:55:31,250 INFO L87 Difference]: Start difference. First operand 1646 states and 5525 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:31,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:31,514 INFO L93 Difference]: Finished difference Result 1728 states and 5763 transitions. [2022-01-28 14:55:31,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:55:31,514 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:31,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:31,517 INFO L225 Difference]: With dead ends: 1728 [2022-01-28 14:55:31,517 INFO L226 Difference]: Without dead ends: 1693 [2022-01-28 14:55:31,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:55:31,518 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 39 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:31,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 210 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 698 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2022-01-28 14:55:31,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2022-01-28 14:55:31,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1646. [2022-01-28 14:55:31,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1645 states have (on average 3.358662613981763) internal successors, (5525), 1645 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 5525 transitions. [2022-01-28 14:55:31,536 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 5525 transitions. Word has length 24 [2022-01-28 14:55:31,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:31,536 INFO L470 AbstractCegarLoop]: Abstraction has 1646 states and 5525 transitions. [2022-01-28 14:55:31,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:31,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 5525 transitions. [2022-01-28 14:55:31,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:31,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:31,539 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:31,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-01-28 14:55:31,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:31,739 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:31,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:31,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1506309885, now seen corresponding path program 197 times [2022-01-28 14:55:31,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:31,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947921737] [2022-01-28 14:55:31,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:31,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:31,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:31,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947921737] [2022-01-28 14:55:31,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947921737] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:31,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487116554] [2022-01-28 14:55:31,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:55:31,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:31,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:31,902 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:31,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-01-28 14:55:31,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:55:31,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:31,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:31,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:32,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:32,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:55:32,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:32,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:55:32,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:32,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:55:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:32,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:32,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:32,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:55:32,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:32,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:55:32,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:32,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:55:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:32,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487116554] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:32,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:32,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:55:32,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548509026] [2022-01-28 14:55:32,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:32,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:55:32,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:32,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:55:32,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:55:32,987 INFO L87 Difference]: Start difference. First operand 1646 states and 5525 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:33,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:33,209 INFO L93 Difference]: Finished difference Result 1738 states and 5796 transitions. [2022-01-28 14:55:33,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:55:33,209 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:33,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:33,212 INFO L225 Difference]: With dead ends: 1738 [2022-01-28 14:55:33,212 INFO L226 Difference]: Without dead ends: 1707 [2022-01-28 14:55:33,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:55:33,212 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:33,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 195 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 564 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2022-01-28 14:55:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2022-01-28 14:55:33,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1658. [2022-01-28 14:55:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.3596861798430897) internal successors, (5567), 1657 states have internal predecessors, (5567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:33,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5567 transitions. [2022-01-28 14:55:33,231 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5567 transitions. Word has length 24 [2022-01-28 14:55:33,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:33,231 INFO L470 AbstractCegarLoop]: Abstraction has 1658 states and 5567 transitions. [2022-01-28 14:55:33,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:33,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5567 transitions. [2022-01-28 14:55:33,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:33,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:33,233 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:33,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-01-28 14:55:33,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-01-28 14:55:33,433 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:33,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:33,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1109722337, now seen corresponding path program 198 times [2022-01-28 14:55:33,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:33,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220620248] [2022-01-28 14:55:33,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:33,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:55:33,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:33,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220620248] [2022-01-28 14:55:33,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220620248] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:33,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007084515] [2022-01-28 14:55:33,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:55:33,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:33,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:33,607 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:33,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-01-28 14:55:33,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:55:33,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:33,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:33,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:33,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:33,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:55:33,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:33,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:55:33,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:33,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:55:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:55:33,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:34,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:34,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:55:34,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:34,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:55:34,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:34,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:55:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:55:34,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007084515] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:34,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:34,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:34,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601012450] [2022-01-28 14:55:34,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:34,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:34,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:34,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:34,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:34,766 INFO L87 Difference]: Start difference. First operand 1658 states and 5567 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:34,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:34,967 INFO L93 Difference]: Finished difference Result 1740 states and 5795 transitions. [2022-01-28 14:55:34,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:55:34,968 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:34,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:34,971 INFO L225 Difference]: With dead ends: 1740 [2022-01-28 14:55:34,971 INFO L226 Difference]: Without dead ends: 1725 [2022-01-28 14:55:34,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:34,971 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:34,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 185 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 517 Invalid, 0 Unknown, 246 Unchecked, 0.2s Time] [2022-01-28 14:55:34,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2022-01-28 14:55:34,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1646. [2022-01-28 14:55:34,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1645 states have (on average 3.358662613981763) internal successors, (5525), 1645 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 5525 transitions. [2022-01-28 14:55:34,989 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 5525 transitions. Word has length 24 [2022-01-28 14:55:34,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:34,990 INFO L470 AbstractCegarLoop]: Abstraction has 1646 states and 5525 transitions. [2022-01-28 14:55:34,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:34,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 5525 transitions. [2022-01-28 14:55:34,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:34,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:34,992 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:35,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:35,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-01-28 14:55:35,192 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:35,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:35,192 INFO L85 PathProgramCache]: Analyzing trace with hash -937632607, now seen corresponding path program 199 times [2022-01-28 14:55:35,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:35,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840081881] [2022-01-28 14:55:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:35,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:35,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:35,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840081881] [2022-01-28 14:55:35,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840081881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:35,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60319620] [2022-01-28 14:55:35,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:55:35,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:35,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:35,363 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:35,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-01-28 14:55:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:35,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:35,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:35,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:55:35,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:35,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:55:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:35,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:36,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:36,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:55:36,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:36,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:55:36,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:36,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:55:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:36,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60319620] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:36,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:36,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:55:36,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500914432] [2022-01-28 14:55:36,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:36,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:55:36,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:36,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:55:36,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:55:36,484 INFO L87 Difference]: Start difference. First operand 1646 states and 5525 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:37,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:37,249 INFO L93 Difference]: Finished difference Result 2046 states and 6579 transitions. [2022-01-28 14:55:37,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:55:37,250 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:37,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:37,253 INFO L225 Difference]: With dead ends: 2046 [2022-01-28 14:55:37,253 INFO L226 Difference]: Without dead ends: 1915 [2022-01-28 14:55:37,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:55:37,253 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 142 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:37,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 255 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:55:37,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2022-01-28 14:55:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1657. [2022-01-28 14:55:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 3.3635265700483092) internal successors, (5570), 1656 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:37,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 5570 transitions. [2022-01-28 14:55:37,275 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 5570 transitions. Word has length 24 [2022-01-28 14:55:37,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:37,275 INFO L470 AbstractCegarLoop]: Abstraction has 1657 states and 5570 transitions. [2022-01-28 14:55:37,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:37,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 5570 transitions. [2022-01-28 14:55:37,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:37,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:37,277 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:37,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:37,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:37,478 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:37,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:37,478 INFO L85 PathProgramCache]: Analyzing trace with hash 420654035, now seen corresponding path program 200 times [2022-01-28 14:55:37,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:37,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283208013] [2022-01-28 14:55:37,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:37,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:37,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:37,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283208013] [2022-01-28 14:55:37,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283208013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:37,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798782556] [2022-01-28 14:55:37,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:55:37,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:37,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:37,720 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:37,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-01-28 14:55:37,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:55:37,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:37,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:37,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:37,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:37,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:55:37,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:37,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:55:37,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:37,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-28 14:55:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:38,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:38,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:38,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2022-01-28 14:55:38,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:38,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:55:38,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:38,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:55:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:38,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798782556] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:38,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:38,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:38,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67552277] [2022-01-28 14:55:38,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:38,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:38,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:38,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:38,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:38,836 INFO L87 Difference]: Start difference. First operand 1657 states and 5570 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:39,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:39,179 INFO L93 Difference]: Finished difference Result 1783 states and 5917 transitions. [2022-01-28 14:55:39,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:55:39,180 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:39,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:39,183 INFO L225 Difference]: With dead ends: 1783 [2022-01-28 14:55:39,183 INFO L226 Difference]: Without dead ends: 1717 [2022-01-28 14:55:39,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:55:39,183 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 71 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:39,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 184 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 565 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2022-01-28 14:55:39,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-01-28 14:55:39,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1657. [2022-01-28 14:55:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 3.3635265700483092) internal successors, (5570), 1656 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 5570 transitions. [2022-01-28 14:55:39,202 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 5570 transitions. Word has length 24 [2022-01-28 14:55:39,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:39,202 INFO L470 AbstractCegarLoop]: Abstraction has 1657 states and 5570 transitions. [2022-01-28 14:55:39,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:39,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 5570 transitions. [2022-01-28 14:55:39,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:39,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:39,205 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:39,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-01-28 14:55:39,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2022-01-28 14:55:39,405 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:39,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:39,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1911584203, now seen corresponding path program 201 times [2022-01-28 14:55:39,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:39,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954843270] [2022-01-28 14:55:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:39,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:39,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:39,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954843270] [2022-01-28 14:55:39,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954843270] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:39,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732333279] [2022-01-28 14:55:39,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:55:39,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:39,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:39,558 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:39,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-01-28 14:55:39,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:55:39,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:39,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:55:39,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:39,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:39,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:55:39,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:39,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:55:39,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:39,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-28 14:55:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:39,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:40,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:40,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:55:40,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:40,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-01-28 14:55:40,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:40,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-01-28 14:55:40,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:40,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732333279] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:40,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:40,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:55:40,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309567542] [2022-01-28 14:55:40,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:40,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:55:40,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:40,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:55:40,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:55:40,514 INFO L87 Difference]: Start difference. First operand 1657 states and 5570 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:40,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:40,789 INFO L93 Difference]: Finished difference Result 1797 states and 5952 transitions. [2022-01-28 14:55:40,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:55:40,789 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:40,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:40,792 INFO L225 Difference]: With dead ends: 1797 [2022-01-28 14:55:40,792 INFO L226 Difference]: Without dead ends: 1714 [2022-01-28 14:55:40,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:40,792 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:40,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 209 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 609 Invalid, 0 Unknown, 235 Unchecked, 0.2s Time] [2022-01-28 14:55:40,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2022-01-28 14:55:40,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1660. [2022-01-28 14:55:40,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 3.359855334538879) internal successors, (5574), 1659 states have internal predecessors, (5574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:40,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 5574 transitions. [2022-01-28 14:55:40,810 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 5574 transitions. Word has length 24 [2022-01-28 14:55:40,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:40,810 INFO L470 AbstractCegarLoop]: Abstraction has 1660 states and 5574 transitions. [2022-01-28 14:55:40,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:40,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 5574 transitions. [2022-01-28 14:55:40,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:40,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:40,813 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:40,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-01-28 14:55:41,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:41,013 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:41,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:41,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1227998287, now seen corresponding path program 202 times [2022-01-28 14:55:41,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:41,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020236975] [2022-01-28 14:55:41,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:41,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:41,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:41,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020236975] [2022-01-28 14:55:41,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020236975] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:41,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703783571] [2022-01-28 14:55:41,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:55:41,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:41,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:41,186 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:41,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-01-28 14:55:41,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:55:41,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:41,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:55:41,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:41,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:41,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:55:41,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:41,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:41,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:41,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:55:41,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:41,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:42,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:42,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:55:42,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:42,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-01-28 14:55:42,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:42,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-01-28 14:55:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:42,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703783571] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:42,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:42,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:42,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533450666] [2022-01-28 14:55:42,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:42,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:42,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:42,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:42,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:42,269 INFO L87 Difference]: Start difference. First operand 1660 states and 5574 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:42,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:42,984 INFO L93 Difference]: Finished difference Result 2115 states and 6723 transitions. [2022-01-28 14:55:42,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:55:42,985 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:42,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:42,988 INFO L225 Difference]: With dead ends: 2115 [2022-01-28 14:55:42,988 INFO L226 Difference]: Without dead ends: 1937 [2022-01-28 14:55:42,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:55:42,988 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 146 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:42,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 322 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 779 Invalid, 0 Unknown, 184 Unchecked, 0.3s Time] [2022-01-28 14:55:42,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2022-01-28 14:55:43,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1675. [2022-01-28 14:55:43,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1675 states, 1674 states have (on average 3.36857825567503) internal successors, (5639), 1674 states have internal predecessors, (5639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:43,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1675 states to 1675 states and 5639 transitions. [2022-01-28 14:55:43,011 INFO L78 Accepts]: Start accepts. Automaton has 1675 states and 5639 transitions. Word has length 24 [2022-01-28 14:55:43,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:43,011 INFO L470 AbstractCegarLoop]: Abstraction has 1675 states and 5639 transitions. [2022-01-28 14:55:43,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:43,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1675 states and 5639 transitions. [2022-01-28 14:55:43,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:43,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:43,014 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:43,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:43,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-01-28 14:55:43,214 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:43,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:43,214 INFO L85 PathProgramCache]: Analyzing trace with hash -633132777, now seen corresponding path program 203 times [2022-01-28 14:55:43,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:43,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165121991] [2022-01-28 14:55:43,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:43,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:55:43,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:43,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165121991] [2022-01-28 14:55:43,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165121991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:43,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625911603] [2022-01-28 14:55:43,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:55:43,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:43,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:43,374 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:43,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-01-28 14:55:43,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:55:43,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:43,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:43,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:43,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:43,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:55:43,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:43,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:43,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:43,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:55:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:55:43,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:44,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:44,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:55:44,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:44,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:55:44,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:44,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:55:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:55:44,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625911603] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:44,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:44,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:44,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733825139] [2022-01-28 14:55:44,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:44,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:44,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:44,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:44,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:44,327 INFO L87 Difference]: Start difference. First operand 1675 states and 5639 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:44,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:44,551 INFO L93 Difference]: Finished difference Result 1758 states and 5886 transitions. [2022-01-28 14:55:44,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:55:44,551 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:44,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:44,554 INFO L225 Difference]: With dead ends: 1758 [2022-01-28 14:55:44,554 INFO L226 Difference]: Without dead ends: 1731 [2022-01-28 14:55:44,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:55:44,554 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:44,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 144 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 542 Invalid, 0 Unknown, 11 Unchecked, 0.2s Time] [2022-01-28 14:55:44,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2022-01-28 14:55:44,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1673. [2022-01-28 14:55:44,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 3.3690191387559807) internal successors, (5633), 1672 states have internal predecessors, (5633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:44,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5633 transitions. [2022-01-28 14:55:44,574 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5633 transitions. Word has length 24 [2022-01-28 14:55:44,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:44,575 INFO L470 AbstractCegarLoop]: Abstraction has 1673 states and 5633 transitions. [2022-01-28 14:55:44,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:44,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5633 transitions. [2022-01-28 14:55:44,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:44,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:44,577 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:44,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-01-28 14:55:44,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2022-01-28 14:55:44,777 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:44,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:44,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1421822241, now seen corresponding path program 204 times [2022-01-28 14:55:44,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:44,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998288758] [2022-01-28 14:55:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:44,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:55:44,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:44,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998288758] [2022-01-28 14:55:44,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998288758] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:44,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336835154] [2022-01-28 14:55:44,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:55:44,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:44,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:44,935 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:44,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-01-28 14:55:44,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:55:44,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:44,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:55:44,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:45,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:45,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:55:45,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:45,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:45,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:45,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:55:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:55:45,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:45,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:45,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2022-01-28 14:55:45,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:45,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-01-28 14:55:45,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:45,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-01-28 14:55:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:55:45,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336835154] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:45,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:45,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:45,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654389539] [2022-01-28 14:55:45,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:45,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:45,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:45,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:45,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:45,943 INFO L87 Difference]: Start difference. First operand 1673 states and 5633 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:46,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:46,796 INFO L93 Difference]: Finished difference Result 2054 states and 6658 transitions. [2022-01-28 14:55:46,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:55:46,797 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:46,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:46,800 INFO L225 Difference]: With dead ends: 2054 [2022-01-28 14:55:46,800 INFO L226 Difference]: Without dead ends: 1947 [2022-01-28 14:55:46,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:55:46,800 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 91 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:46,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 303 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 875 Invalid, 0 Unknown, 12 Unchecked, 0.3s Time] [2022-01-28 14:55:46,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2022-01-28 14:55:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1672. [2022-01-28 14:55:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.366846199880311) internal successors, (5626), 1671 states have internal predecessors, (5626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 5626 transitions. [2022-01-28 14:55:46,821 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 5626 transitions. Word has length 24 [2022-01-28 14:55:46,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:46,821 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 5626 transitions. [2022-01-28 14:55:46,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:46,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 5626 transitions. [2022-01-28 14:55:46,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:46,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:46,824 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:46,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:47,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:47,024 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:47,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:47,024 INFO L85 PathProgramCache]: Analyzing trace with hash 506740753, now seen corresponding path program 205 times [2022-01-28 14:55:47,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:47,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626060846] [2022-01-28 14:55:47,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:47,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:47,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:47,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626060846] [2022-01-28 14:55:47,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626060846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:47,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457280819] [2022-01-28 14:55:47,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:55:47,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:47,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:47,156 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:47,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-01-28 14:55:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:47,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:47,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:47,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:47,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:55:47,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:47,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:47,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:47,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:55:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:47,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:47,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:47,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:55:48,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:48,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:55:48,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:48,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:55:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:48,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457280819] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:48,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:48,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:48,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939968093] [2022-01-28 14:55:48,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:48,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:48,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:48,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:48,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:48,157 INFO L87 Difference]: Start difference. First operand 1672 states and 5626 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:48,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:48,375 INFO L93 Difference]: Finished difference Result 1751 states and 5846 transitions. [2022-01-28 14:55:48,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:55:48,375 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:48,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:48,378 INFO L225 Difference]: With dead ends: 1751 [2022-01-28 14:55:48,378 INFO L226 Difference]: Without dead ends: 1736 [2022-01-28 14:55:48,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:55:48,378 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:48,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 188 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 534 Invalid, 0 Unknown, 264 Unchecked, 0.2s Time] [2022-01-28 14:55:48,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2022-01-28 14:55:48,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1672. [2022-01-28 14:55:48,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.366846199880311) internal successors, (5626), 1671 states have internal predecessors, (5626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:48,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 5626 transitions. [2022-01-28 14:55:48,398 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 5626 transitions. Word has length 24 [2022-01-28 14:55:48,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:48,398 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 5626 transitions. [2022-01-28 14:55:48,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:48,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 5626 transitions. [2022-01-28 14:55:48,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:48,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:48,400 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:48,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:48,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:48,600 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:48,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:48,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2136973911, now seen corresponding path program 206 times [2022-01-28 14:55:48,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:48,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68128475] [2022-01-28 14:55:48,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:48,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:48,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:48,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68128475] [2022-01-28 14:55:48,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68128475] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:48,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704451548] [2022-01-28 14:55:48,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:55:48,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:48,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:48,721 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:48,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-01-28 14:55:48,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:55:48,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:48,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:48,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:48,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:48,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:55:48,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:48,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:48,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:48,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:55:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:49,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:49,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:49,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 107 [2022-01-28 14:55:49,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:49,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:55:49,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:49,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:55:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:49,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704451548] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:49,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:49,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:49,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860886668] [2022-01-28 14:55:49,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:49,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:49,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:49,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:49,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:49,637 INFO L87 Difference]: Start difference. First operand 1672 states and 5626 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:49,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:49,847 INFO L93 Difference]: Finished difference Result 1750 states and 5862 transitions. [2022-01-28 14:55:49,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:55:49,848 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:49,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:49,851 INFO L225 Difference]: With dead ends: 1750 [2022-01-28 14:55:49,852 INFO L226 Difference]: Without dead ends: 1719 [2022-01-28 14:55:49,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:55:49,852 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:49,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 205 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 523 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-01-28 14:55:49,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-01-28 14:55:49,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1679. [2022-01-28 14:55:49,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 3.369487485101311) internal successors, (5654), 1678 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:49,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 5654 transitions. [2022-01-28 14:55:49,874 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 5654 transitions. Word has length 24 [2022-01-28 14:55:49,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:49,874 INFO L470 AbstractCegarLoop]: Abstraction has 1679 states and 5654 transitions. [2022-01-28 14:55:49,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 5654 transitions. [2022-01-28 14:55:49,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:49,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:49,876 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:49,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-01-28 14:55:50,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-01-28 14:55:50,076 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:50,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:50,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1571077783, now seen corresponding path program 207 times [2022-01-28 14:55:50,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:50,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392657463] [2022-01-28 14:55:50,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:50,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:50,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:50,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392657463] [2022-01-28 14:55:50,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392657463] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:50,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846386693] [2022-01-28 14:55:50,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:55:50,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:50,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:50,194 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:50,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-01-28 14:55:50,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:55:50,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:50,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:55:50,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:50,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:50,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:55:50,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:50,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:55:50,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:50,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:55:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:50,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:50,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:50,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:55:51,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:51,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-01-28 14:55:51,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:51,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-01-28 14:55:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:51,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846386693] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:51,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:51,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:51,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246076592] [2022-01-28 14:55:51,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:51,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:51,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:51,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:51,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:51,129 INFO L87 Difference]: Start difference. First operand 1679 states and 5654 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:51,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:51,314 INFO L93 Difference]: Finished difference Result 1764 states and 5869 transitions. [2022-01-28 14:55:51,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:55:51,314 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:51,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:51,317 INFO L225 Difference]: With dead ends: 1764 [2022-01-28 14:55:51,317 INFO L226 Difference]: Without dead ends: 1718 [2022-01-28 14:55:51,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:51,318 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 50 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:51,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 178 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 481 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-01-28 14:55:51,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2022-01-28 14:55:51,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1693. [2022-01-28 14:55:51,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1692 states have (on average 3.354609929078014) internal successors, (5676), 1692 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:51,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 5676 transitions. [2022-01-28 14:55:51,337 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 5676 transitions. Word has length 24 [2022-01-28 14:55:51,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:51,337 INFO L470 AbstractCegarLoop]: Abstraction has 1693 states and 5676 transitions. [2022-01-28 14:55:51,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:51,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 5676 transitions. [2022-01-28 14:55:51,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:51,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:51,339 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:51,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-01-28 14:55:51,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-01-28 14:55:51,540 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:51,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:51,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2048507585, now seen corresponding path program 208 times [2022-01-28 14:55:51,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:51,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28340285] [2022-01-28 14:55:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:51,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:51,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:51,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28340285] [2022-01-28 14:55:51,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28340285] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:51,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164353832] [2022-01-28 14:55:51,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:55:51,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:51,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:51,664 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:51,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-01-28 14:55:51,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:55:51,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:51,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:51,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:51,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:51,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:55:52,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:52,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:55:52,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:52,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:55:52,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:52,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:52,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:52,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:55:52,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:52,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:55:52,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:52,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:55:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:52,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164353832] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:52,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:52,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:52,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942095286] [2022-01-28 14:55:52,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:52,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:52,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:52,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:52,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:52,608 INFO L87 Difference]: Start difference. First operand 1693 states and 5676 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:52,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:52,784 INFO L93 Difference]: Finished difference Result 1723 states and 5763 transitions. [2022-01-28 14:55:52,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:55:52,784 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:52,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:52,787 INFO L225 Difference]: With dead ends: 1723 [2022-01-28 14:55:52,787 INFO L226 Difference]: Without dead ends: 1720 [2022-01-28 14:55:52,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:52,788 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:52,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 165 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 459 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2022-01-28 14:55:52,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2022-01-28 14:55:52,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 1691. [2022-01-28 14:55:52,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 3.357396449704142) internal successors, (5674), 1690 states have internal predecessors, (5674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 5674 transitions. [2022-01-28 14:55:52,807 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 5674 transitions. Word has length 24 [2022-01-28 14:55:52,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:52,807 INFO L470 AbstractCegarLoop]: Abstraction has 1691 states and 5674 transitions. [2022-01-28 14:55:52,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:52,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 5674 transitions. [2022-01-28 14:55:52,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:52,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:52,809 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:52,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-01-28 14:55:53,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-01-28 14:55:53,009 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:53,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:53,010 INFO L85 PathProgramCache]: Analyzing trace with hash -132608321, now seen corresponding path program 209 times [2022-01-28 14:55:53,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:53,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939362141] [2022-01-28 14:55:53,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:53,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:53,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:53,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939362141] [2022-01-28 14:55:53,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939362141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:53,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919371076] [2022-01-28 14:55:53,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:55:53,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:53,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:53,139 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:53,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-01-28 14:55:53,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:55:53,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:53,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:53,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:53,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:53,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:55:53,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:53,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:53,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:53,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:55:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:53,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:53,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:53,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:55:53,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:53,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:55:53,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:53,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:55:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:53,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919371076] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:53,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:53,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:53,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019546307] [2022-01-28 14:55:53,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:53,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:53,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:53,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:53,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:53,973 INFO L87 Difference]: Start difference. First operand 1691 states and 5674 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:54,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:54,158 INFO L93 Difference]: Finished difference Result 1795 states and 5986 transitions. [2022-01-28 14:55:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:55:54,158 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:54,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:54,160 INFO L225 Difference]: With dead ends: 1795 [2022-01-28 14:55:54,161 INFO L226 Difference]: Without dead ends: 1768 [2022-01-28 14:55:54,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:55:54,161 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 77 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:54,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 131 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 425 Invalid, 0 Unknown, 131 Unchecked, 0.2s Time] [2022-01-28 14:55:54,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2022-01-28 14:55:54,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1697. [2022-01-28 14:55:54,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 3.359669811320755) internal successors, (5698), 1696 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:54,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5698 transitions. [2022-01-28 14:55:54,191 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5698 transitions. Word has length 24 [2022-01-28 14:55:54,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:54,191 INFO L470 AbstractCegarLoop]: Abstraction has 1697 states and 5698 transitions. [2022-01-28 14:55:54,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:54,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5698 transitions. [2022-01-28 14:55:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:54,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:54,194 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:54,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:54,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-01-28 14:55:54,394 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:54,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:54,395 INFO L85 PathProgramCache]: Analyzing trace with hash 454307281, now seen corresponding path program 210 times [2022-01-28 14:55:54,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:54,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347364745] [2022-01-28 14:55:54,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:54,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:54,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:54,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347364745] [2022-01-28 14:55:54,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347364745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:54,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909859601] [2022-01-28 14:55:54,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:55:54,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:54,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:54,528 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:54,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-01-28 14:55:54,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:55:54,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:54,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:54,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:54,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:54,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:55:54,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:54,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:54,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:54,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:55:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:54,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:55,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:55,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2022-01-28 14:55:55,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:55,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:55:55,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:55,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:55:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:55,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909859601] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:55,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:55,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:55,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685814943] [2022-01-28 14:55:55,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:55,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:55,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:55,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:55,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:55,389 INFO L87 Difference]: Start difference. First operand 1697 states and 5698 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:55,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:55,572 INFO L93 Difference]: Finished difference Result 1737 states and 5805 transitions. [2022-01-28 14:55:55,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:55:55,573 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:55,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:55,576 INFO L225 Difference]: With dead ends: 1737 [2022-01-28 14:55:55,576 INFO L226 Difference]: Without dead ends: 1730 [2022-01-28 14:55:55,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:55:55,576 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:55,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 157 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 449 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-01-28 14:55:55,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2022-01-28 14:55:55,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1700. [2022-01-28 14:55:55,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 3.357857563272513) internal successors, (5705), 1699 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:55,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 5705 transitions. [2022-01-28 14:55:55,603 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 5705 transitions. Word has length 24 [2022-01-28 14:55:55,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:55,603 INFO L470 AbstractCegarLoop]: Abstraction has 1700 states and 5705 transitions. [2022-01-28 14:55:55,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:55,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 5705 transitions. [2022-01-28 14:55:55,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:55,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:55,606 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:55,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-01-28 14:55:55,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2022-01-28 14:55:55,806 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:55,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:55,807 INFO L85 PathProgramCache]: Analyzing trace with hash -221074647, now seen corresponding path program 211 times [2022-01-28 14:55:55,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:55,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872214746] [2022-01-28 14:55:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:55,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:55,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:55,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872214746] [2022-01-28 14:55:55,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872214746] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:55,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79931091] [2022-01-28 14:55:55,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:55:55,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:55,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:55,937 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:55,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-01-28 14:55:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:55,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:55,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:56,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:56,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:55:56,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:56,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:55:56,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:56,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:55:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:56,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:56,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:56,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:55:56,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:56,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:55:56,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:56,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:55:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:56,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79931091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:56,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:56,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:56,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151693582] [2022-01-28 14:55:56,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:56,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:56,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:56,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:56,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:56,949 INFO L87 Difference]: Start difference. First operand 1700 states and 5705 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:57,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:57,153 INFO L93 Difference]: Finished difference Result 1733 states and 5797 transitions. [2022-01-28 14:55:57,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:55:57,153 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:57,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:57,156 INFO L225 Difference]: With dead ends: 1733 [2022-01-28 14:55:57,156 INFO L226 Difference]: Without dead ends: 1730 [2022-01-28 14:55:57,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:57,156 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:57,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 223 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 552 Invalid, 0 Unknown, 123 Unchecked, 0.2s Time] [2022-01-28 14:55:57,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2022-01-28 14:55:57,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1697. [2022-01-28 14:55:57,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 3.359669811320755) internal successors, (5698), 1696 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5698 transitions. [2022-01-28 14:55:57,175 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5698 transitions. Word has length 24 [2022-01-28 14:55:57,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:57,175 INFO L470 AbstractCegarLoop]: Abstraction has 1697 states and 5698 transitions. [2022-01-28 14:55:57,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:57,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5698 transitions. [2022-01-28 14:55:57,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:57,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:57,177 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:57,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:57,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:57,384 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:57,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:57,385 INFO L85 PathProgramCache]: Analyzing trace with hash 986911307, now seen corresponding path program 212 times [2022-01-28 14:55:57,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:57,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388188704] [2022-01-28 14:55:57,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:57,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:57,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:57,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388188704] [2022-01-28 14:55:57,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388188704] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:57,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188641958] [2022-01-28 14:55:57,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:55:57,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:57,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:57,498 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:57,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-01-28 14:55:57,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:55:57,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:57,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:57,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:57,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:57,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:55:57,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:57,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:55:57,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:57,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:55:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:57,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:58,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:58,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:55:58,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:58,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:55:58,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:58,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:55:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:55:58,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188641958] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:58,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:58,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:55:58,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25629314] [2022-01-28 14:55:58,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:58,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:55:58,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:58,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:55:58,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:58,439 INFO L87 Difference]: Start difference. First operand 1697 states and 5698 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:58,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:58,627 INFO L93 Difference]: Finished difference Result 1811 states and 5983 transitions. [2022-01-28 14:55:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:55:58,627 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:55:58,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:58,631 INFO L225 Difference]: With dead ends: 1811 [2022-01-28 14:55:58,631 INFO L226 Difference]: Without dead ends: 1769 [2022-01-28 14:55:58,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:58,631 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 50 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:58,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 277 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 486 Invalid, 0 Unknown, 314 Unchecked, 0.2s Time] [2022-01-28 14:55:58,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2022-01-28 14:55:58,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1702. [2022-01-28 14:55:58,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 3.3580246913580245) internal successors, (5712), 1701 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:58,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 5712 transitions. [2022-01-28 14:55:58,652 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 5712 transitions. Word has length 24 [2022-01-28 14:55:58,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:58,652 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 5712 transitions. [2022-01-28 14:55:58,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:58,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 5712 transitions. [2022-01-28 14:55:58,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:55:58,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:58,655 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:58,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:58,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:58,855 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:58,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:58,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1613019357, now seen corresponding path program 213 times [2022-01-28 14:55:58,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:58,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902446663] [2022-01-28 14:55:58,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:58,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:55:59,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:59,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902446663] [2022-01-28 14:55:59,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902446663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:59,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488556829] [2022-01-28 14:55:59,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:55:59,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:59,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:59,005 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:55:59,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-01-28 14:55:59,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:55:59,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:59,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:55:59,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:59,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:59,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:55:59,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:59,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:55:59,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:59,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:55:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:55:59,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:59,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:59,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:55:59,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:59,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:55:59,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:59,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:56:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:56:00,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488556829] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:00,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:00,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:56:00,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843047197] [2022-01-28 14:56:00,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:00,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:00,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:00,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:00,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:00,037 INFO L87 Difference]: Start difference. First operand 1702 states and 5712 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:00,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:00,256 INFO L93 Difference]: Finished difference Result 1748 states and 5839 transitions. [2022-01-28 14:56:00,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:56:00,257 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:00,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:00,260 INFO L225 Difference]: With dead ends: 1748 [2022-01-28 14:56:00,260 INFO L226 Difference]: Without dead ends: 1745 [2022-01-28 14:56:00,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:00,260 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:00,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 203 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 566 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2022-01-28 14:56:00,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2022-01-28 14:56:00,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 1702. [2022-01-28 14:56:00,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 3.3580246913580245) internal successors, (5712), 1701 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:00,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 5712 transitions. [2022-01-28 14:56:00,280 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 5712 transitions. Word has length 24 [2022-01-28 14:56:00,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:00,280 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 5712 transitions. [2022-01-28 14:56:00,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:00,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 5712 transitions. [2022-01-28 14:56:00,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:00,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:00,282 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:00,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-01-28 14:56:00,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-01-28 14:56:00,482 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:00,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:00,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1621169849, now seen corresponding path program 214 times [2022-01-28 14:56:00,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:00,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784905114] [2022-01-28 14:56:00,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:00,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:56:00,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:00,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784905114] [2022-01-28 14:56:00,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784905114] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:00,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358439021] [2022-01-28 14:56:00,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:56:00,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:00,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:00,585 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:00,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-01-28 14:56:00,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:56:00,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:00,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:00,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:00,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:56:00,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:56:00,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:56:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:56:00,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:01,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:01,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:56:01,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:01,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:56:01,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:01,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:56:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:56:01,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358439021] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:01,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:01,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:56:01,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274090373] [2022-01-28 14:56:01,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:01,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:01,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:01,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:01,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:01,458 INFO L87 Difference]: Start difference. First operand 1702 states and 5712 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:01,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:01,839 INFO L93 Difference]: Finished difference Result 1761 states and 5865 transitions. [2022-01-28 14:56:01,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:56:01,839 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:01,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:01,842 INFO L225 Difference]: With dead ends: 1761 [2022-01-28 14:56:01,842 INFO L226 Difference]: Without dead ends: 1758 [2022-01-28 14:56:01,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:56:01,842 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 66 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:01,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 199 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:56:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2022-01-28 14:56:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1679. [2022-01-28 14:56:01,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 3.369487485101311) internal successors, (5654), 1678 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 5654 transitions. [2022-01-28 14:56:01,862 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 5654 transitions. Word has length 24 [2022-01-28 14:56:01,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:01,862 INFO L470 AbstractCegarLoop]: Abstraction has 1679 states and 5654 transitions. [2022-01-28 14:56:01,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 5654 transitions. [2022-01-28 14:56:01,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:01,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:01,864 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:01,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-01-28 14:56:02,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:02,065 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:02,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1555213131, now seen corresponding path program 215 times [2022-01-28 14:56:02,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:02,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762921250] [2022-01-28 14:56:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:02,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:02,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:02,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762921250] [2022-01-28 14:56:02,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762921250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:02,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692794911] [2022-01-28 14:56:02,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:56:02,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:02,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:02,281 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:02,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-01-28 14:56:02,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:56:02,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:02,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:02,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:02,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:02,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:56:02,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:02,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:56:02,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:02,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:56:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:02,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:03,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:03,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 107 [2022-01-28 14:56:03,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:03,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:56:03,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:03,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:56:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:03,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692794911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:03,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:03,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:56:03,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640002181] [2022-01-28 14:56:03,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:03,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:56:03,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:03,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:56:03,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:03,567 INFO L87 Difference]: Start difference. First operand 1679 states and 5654 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:03,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:03,887 INFO L93 Difference]: Finished difference Result 1806 states and 6005 transitions. [2022-01-28 14:56:03,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:56:03,888 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:03,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:03,891 INFO L225 Difference]: With dead ends: 1806 [2022-01-28 14:56:03,891 INFO L226 Difference]: Without dead ends: 1740 [2022-01-28 14:56:03,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:56:03,891 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 66 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:03,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 180 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 582 Invalid, 0 Unknown, 143 Unchecked, 0.2s Time] [2022-01-28 14:56:03,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2022-01-28 14:56:03,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1680. [2022-01-28 14:56:03,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.3698630136986303) internal successors, (5658), 1679 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:03,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5658 transitions. [2022-01-28 14:56:03,911 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5658 transitions. Word has length 24 [2022-01-28 14:56:03,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:03,912 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 5658 transitions. [2022-01-28 14:56:03,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:03,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5658 transitions. [2022-01-28 14:56:03,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:03,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:03,914 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:03,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:04,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:04,115 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:04,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:04,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1439692417, now seen corresponding path program 216 times [2022-01-28 14:56:04,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:04,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54379411] [2022-01-28 14:56:04,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:04,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:04,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:04,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54379411] [2022-01-28 14:56:04,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54379411] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:04,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275038682] [2022-01-28 14:56:04,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:56:04,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:04,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:04,295 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:04,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-01-28 14:56:04,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:56:04,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:04,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:04,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:04,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:04,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:56:04,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:04,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:04,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:04,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:56:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:04,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:05,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:05,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 107 [2022-01-28 14:56:05,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:05,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:56:05,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:05,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:56:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:05,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275038682] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:05,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:05,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:56:05,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737686869] [2022-01-28 14:56:05,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:05,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:56:05,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:05,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:56:05,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:05,531 INFO L87 Difference]: Start difference. First operand 1680 states and 5658 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:05,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:05,685 INFO L93 Difference]: Finished difference Result 1758 states and 5894 transitions. [2022-01-28 14:56:05,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:56:05,686 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:05,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:05,688 INFO L225 Difference]: With dead ends: 1758 [2022-01-28 14:56:05,688 INFO L226 Difference]: Without dead ends: 1727 [2022-01-28 14:56:05,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:56:05,689 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:05,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 123 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 316 Invalid, 0 Unknown, 215 Unchecked, 0.1s Time] [2022-01-28 14:56:05,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-01-28 14:56:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1687. [2022-01-28 14:56:05,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 3.372479240806643) internal successors, (5686), 1686 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 5686 transitions. [2022-01-28 14:56:05,707 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 5686 transitions. Word has length 24 [2022-01-28 14:56:05,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:05,708 INFO L470 AbstractCegarLoop]: Abstraction has 1687 states and 5686 transitions. [2022-01-28 14:56:05,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 5686 transitions. [2022-01-28 14:56:05,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:05,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:05,710 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:05,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:05,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:05,910 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:05,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:05,910 INFO L85 PathProgramCache]: Analyzing trace with hash -108871757, now seen corresponding path program 217 times [2022-01-28 14:56:05,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:05,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713844561] [2022-01-28 14:56:05,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:05,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:06,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:06,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713844561] [2022-01-28 14:56:06,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713844561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:06,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185859287] [2022-01-28 14:56:06,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:56:06,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:06,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:06,067 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:06,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-01-28 14:56:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:06,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:56:06,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:06,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:56:06,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:56:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:06,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:06,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:06,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:56:07,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:07,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 51 [2022-01-28 14:56:07,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:07,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-01-28 14:56:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:07,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185859287] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:07,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:07,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-01-28 14:56:07,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503547655] [2022-01-28 14:56:07,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:07,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:56:07,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:07,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:56:07,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:56:07,091 INFO L87 Difference]: Start difference. First operand 1687 states and 5686 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:07,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:07,648 INFO L93 Difference]: Finished difference Result 2019 states and 6546 transitions. [2022-01-28 14:56:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:56:07,648 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:07,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:07,652 INFO L225 Difference]: With dead ends: 2019 [2022-01-28 14:56:07,652 INFO L226 Difference]: Without dead ends: 1870 [2022-01-28 14:56:07,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:56:07,652 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 114 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:07,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 258 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:56:07,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2022-01-28 14:56:07,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1683. [2022-01-28 14:56:07,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.3686087990487517) internal successors, (5666), 1682 states have internal predecessors, (5666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5666 transitions. [2022-01-28 14:56:07,673 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5666 transitions. Word has length 24 [2022-01-28 14:56:07,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:07,673 INFO L470 AbstractCegarLoop]: Abstraction has 1683 states and 5666 transitions. [2022-01-28 14:56:07,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:07,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5666 transitions. [2022-01-28 14:56:07,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:07,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:07,675 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:07,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:07,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-01-28 14:56:07,879 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:07,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:07,879 INFO L85 PathProgramCache]: Analyzing trace with hash -593274527, now seen corresponding path program 218 times [2022-01-28 14:56:07,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:07,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495634464] [2022-01-28 14:56:07,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:07,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:08,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:08,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495634464] [2022-01-28 14:56:08,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495634464] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:08,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903571542] [2022-01-28 14:56:08,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:56:08,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:08,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:08,046 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:08,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-01-28 14:56:08,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:56:08,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:08,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:08,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:08,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:56:08,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:56:08,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:56:08,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:56:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:08,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:08,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:08,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2022-01-28 14:56:08,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:08,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-28 14:56:08,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:08,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-28 14:56:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:08,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903571542] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:08,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:08,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:56:08,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002583704] [2022-01-28 14:56:08,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:08,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:08,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:08,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:08,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:08,871 INFO L87 Difference]: Start difference. First operand 1683 states and 5666 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:09,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:09,863 INFO L93 Difference]: Finished difference Result 2050 states and 6572 transitions. [2022-01-28 14:56:09,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:56:09,864 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:09,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:09,867 INFO L225 Difference]: With dead ends: 2050 [2022-01-28 14:56:09,867 INFO L226 Difference]: Without dead ends: 1921 [2022-01-28 14:56:09,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 14:56:09,867 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 160 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:09,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 298 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:56:09,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2022-01-28 14:56:09,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1681. [2022-01-28 14:56:09,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1681 states, 1680 states have (on average 3.369642857142857) internal successors, (5661), 1680 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:09,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1681 states to 1681 states and 5661 transitions. [2022-01-28 14:56:09,889 INFO L78 Accepts]: Start accepts. Automaton has 1681 states and 5661 transitions. Word has length 24 [2022-01-28 14:56:09,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:09,889 INFO L470 AbstractCegarLoop]: Abstraction has 1681 states and 5661 transitions. [2022-01-28 14:56:09,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:09,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1681 states and 5661 transitions. [2022-01-28 14:56:09,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:09,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:09,891 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:09,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-01-28 14:56:10,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-01-28 14:56:10,092 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:10,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:10,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1974379607, now seen corresponding path program 219 times [2022-01-28 14:56:10,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:10,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659703023] [2022-01-28 14:56:10,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:10,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:10,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:10,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659703023] [2022-01-28 14:56:10,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659703023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:10,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510891262] [2022-01-28 14:56:10,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:56:10,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:10,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:10,273 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:10,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-01-28 14:56:10,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:56:10,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:10,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:10,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:10,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:10,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:10,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:10,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:56:10,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:10,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 14:56:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:10,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:11,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:11,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 99 [2022-01-28 14:56:11,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:11,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2022-01-28 14:56:11,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:11,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2022-01-28 14:56:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:11,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510891262] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:11,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:11,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:56:11,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848277180] [2022-01-28 14:56:11,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:11,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:56:11,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:11,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:56:11,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:56:11,348 INFO L87 Difference]: Start difference. First operand 1681 states and 5661 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:11,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:11,868 INFO L93 Difference]: Finished difference Result 1780 states and 5964 transitions. [2022-01-28 14:56:11,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:56:11,869 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:11,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:11,871 INFO L225 Difference]: With dead ends: 1780 [2022-01-28 14:56:11,872 INFO L226 Difference]: Without dead ends: 1745 [2022-01-28 14:56:11,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:56:11,872 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 66 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:11,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 205 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 716 Invalid, 0 Unknown, 12 Unchecked, 0.3s Time] [2022-01-28 14:56:11,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2022-01-28 14:56:11,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 1685. [2022-01-28 14:56:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1684 states have (on average 3.371140142517815) internal successors, (5677), 1684 states have internal predecessors, (5677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:11,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 5677 transitions. [2022-01-28 14:56:11,890 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 5677 transitions. Word has length 24 [2022-01-28 14:56:11,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:11,890 INFO L470 AbstractCegarLoop]: Abstraction has 1685 states and 5677 transitions. [2022-01-28 14:56:11,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:11,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 5677 transitions. [2022-01-28 14:56:11,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:11,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:11,892 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:11,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:12,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-01-28 14:56:12,093 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:12,093 INFO L85 PathProgramCache]: Analyzing trace with hash -38685129, now seen corresponding path program 220 times [2022-01-28 14:56:12,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:12,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339791220] [2022-01-28 14:56:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:12,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:12,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:12,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339791220] [2022-01-28 14:56:12,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339791220] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:12,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483509008] [2022-01-28 14:56:12,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:56:12,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:12,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:12,300 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:12,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-01-28 14:56:12,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:56:12,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:12,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:12,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:12,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:12,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:12,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:12,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:56:12,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:12,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-28 14:56:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:12,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:13,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:13,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 84 [2022-01-28 14:56:13,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:13,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 113 [2022-01-28 14:56:13,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:13,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 85 [2022-01-28 14:56:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:13,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483509008] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:13,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:13,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:56:13,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019029491] [2022-01-28 14:56:13,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:13,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:56:13,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:13,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:56:13,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:13,446 INFO L87 Difference]: Start difference. First operand 1685 states and 5677 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:13,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:13,777 INFO L93 Difference]: Finished difference Result 1771 states and 5911 transitions. [2022-01-28 14:56:13,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:56:13,778 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:13,780 INFO L225 Difference]: With dead ends: 1771 [2022-01-28 14:56:13,780 INFO L226 Difference]: Without dead ends: 1732 [2022-01-28 14:56:13,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:56:13,781 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:13,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 234 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 500 Invalid, 0 Unknown, 227 Unchecked, 0.2s Time] [2022-01-28 14:56:13,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2022-01-28 14:56:13,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1683. [2022-01-28 14:56:13,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.370986920332937) internal successors, (5670), 1682 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:13,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5670 transitions. [2022-01-28 14:56:13,800 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5670 transitions. Word has length 24 [2022-01-28 14:56:13,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:13,800 INFO L470 AbstractCegarLoop]: Abstraction has 1683 states and 5670 transitions. [2022-01-28 14:56:13,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:13,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5670 transitions. [2022-01-28 14:56:13,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:13,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:13,802 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:13,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-01-28 14:56:14,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-01-28 14:56:14,002 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:14,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:14,003 INFO L85 PathProgramCache]: Analyzing trace with hash -2012036845, now seen corresponding path program 221 times [2022-01-28 14:56:14,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:14,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553372538] [2022-01-28 14:56:14,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:14,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:14,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:14,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553372538] [2022-01-28 14:56:14,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553372538] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:14,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964273961] [2022-01-28 14:56:14,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:56:14,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:14,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:14,189 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:14,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-01-28 14:56:14,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:56:14,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:14,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:14,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:14,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:14,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:14,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:14,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:56:14,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:14,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:56:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:14,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:14,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:14,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 99 [2022-01-28 14:56:15,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:15,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2022-01-28 14:56:15,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:15,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2022-01-28 14:56:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:15,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964273961] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:15,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:15,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:56:15,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349876782] [2022-01-28 14:56:15,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:15,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:56:15,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:15,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:56:15,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:56:15,266 INFO L87 Difference]: Start difference. First operand 1683 states and 5670 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:15,985 INFO L93 Difference]: Finished difference Result 1894 states and 6277 transitions. [2022-01-28 14:56:15,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:56:15,985 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:15,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:15,989 INFO L225 Difference]: With dead ends: 1894 [2022-01-28 14:56:15,989 INFO L226 Difference]: Without dead ends: 1797 [2022-01-28 14:56:15,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:56:15,989 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 114 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:15,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 231 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 860 Invalid, 0 Unknown, 9 Unchecked, 0.3s Time] [2022-01-28 14:56:15,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2022-01-28 14:56:16,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1683. [2022-01-28 14:56:16,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.370986920332937) internal successors, (5670), 1682 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5670 transitions. [2022-01-28 14:56:16,010 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5670 transitions. Word has length 24 [2022-01-28 14:56:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:16,010 INFO L470 AbstractCegarLoop]: Abstraction has 1683 states and 5670 transitions. [2022-01-28 14:56:16,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5670 transitions. [2022-01-28 14:56:16,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:16,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:16,012 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:16,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-01-28 14:56:16,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:16,223 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:16,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:16,224 INFO L85 PathProgramCache]: Analyzing trace with hash 249963507, now seen corresponding path program 222 times [2022-01-28 14:56:16,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:16,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083584612] [2022-01-28 14:56:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:16,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:16,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:16,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083584612] [2022-01-28 14:56:16,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083584612] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:16,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991494396] [2022-01-28 14:56:16,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:56:16,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:16,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:16,440 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:16,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-01-28 14:56:16,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:56:16,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:16,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:16,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:16,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:16,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:16,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:16,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:56:16,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:16,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:56:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:16,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:17,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:17,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:56:17,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:17,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 108 [2022-01-28 14:56:17,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:17,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 80 [2022-01-28 14:56:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:17,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991494396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:17,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:17,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:56:17,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345344955] [2022-01-28 14:56:17,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:17,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:56:17,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:17,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:56:17,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:17,538 INFO L87 Difference]: Start difference. First operand 1683 states and 5670 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:17,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:17,917 INFO L93 Difference]: Finished difference Result 1771 states and 5909 transitions. [2022-01-28 14:56:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:56:17,918 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:17,921 INFO L225 Difference]: With dead ends: 1771 [2022-01-28 14:56:17,921 INFO L226 Difference]: Without dead ends: 1732 [2022-01-28 14:56:17,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:56:17,921 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:17,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 246 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 568 Invalid, 0 Unknown, 140 Unchecked, 0.2s Time] [2022-01-28 14:56:17,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2022-01-28 14:56:17,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1685. [2022-01-28 14:56:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1684 states have (on average 3.369952494061758) internal successors, (5675), 1684 states have internal predecessors, (5675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:17,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 5675 transitions. [2022-01-28 14:56:17,941 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 5675 transitions. Word has length 24 [2022-01-28 14:56:17,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:17,941 INFO L470 AbstractCegarLoop]: Abstraction has 1685 states and 5675 transitions. [2022-01-28 14:56:17,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:17,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 5675 transitions. [2022-01-28 14:56:17,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:17,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:17,943 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:17,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-01-28 14:56:18,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-01-28 14:56:18,144 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:18,144 INFO L85 PathProgramCache]: Analyzing trace with hash -848461897, now seen corresponding path program 223 times [2022-01-28 14:56:18,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:18,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905996094] [2022-01-28 14:56:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:18,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:18,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:18,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905996094] [2022-01-28 14:56:18,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905996094] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:18,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278804665] [2022-01-28 14:56:18,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:56:18,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:18,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:18,314 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:18,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-01-28 14:56:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:18,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:18,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:18,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:18,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:18,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:18,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:56:18,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:18,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-28 14:56:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:18,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:19,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:19,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:56:19,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:19,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 108 [2022-01-28 14:56:19,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:19,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 80 [2022-01-28 14:56:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:19,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278804665] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:19,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:19,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:56:19,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98146349] [2022-01-28 14:56:19,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:19,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:56:19,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:19,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:56:19,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:56:19,369 INFO L87 Difference]: Start difference. First operand 1685 states and 5675 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:19,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:19,697 INFO L93 Difference]: Finished difference Result 1779 states and 5929 transitions. [2022-01-28 14:56:19,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:56:19,697 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:19,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:19,700 INFO L225 Difference]: With dead ends: 1779 [2022-01-28 14:56:19,700 INFO L226 Difference]: Without dead ends: 1744 [2022-01-28 14:56:19,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:56:19,700 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:19,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 175 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 598 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-01-28 14:56:19,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2022-01-28 14:56:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1683. [2022-01-28 14:56:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.370986920332937) internal successors, (5670), 1682 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5670 transitions. [2022-01-28 14:56:19,719 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5670 transitions. Word has length 24 [2022-01-28 14:56:19,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:19,719 INFO L470 AbstractCegarLoop]: Abstraction has 1683 states and 5670 transitions. [2022-01-28 14:56:19,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:19,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5670 transitions. [2022-01-28 14:56:19,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:19,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:19,722 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:19,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-01-28 14:56:19,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2022-01-28 14:56:19,922 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:19,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:19,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1606762527, now seen corresponding path program 224 times [2022-01-28 14:56:19,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:19,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877038145] [2022-01-28 14:56:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:19,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:20,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:20,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877038145] [2022-01-28 14:56:20,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877038145] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:20,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784559460] [2022-01-28 14:56:20,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:56:20,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:20,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:20,149 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:20,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-01-28 14:56:20,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:56:20,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:20,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:56:20,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:20,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:20,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:56:20,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:20,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:56:20,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:20,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:56:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:20,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:21,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:21,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2022-01-28 14:56:21,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:21,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 83 [2022-01-28 14:56:21,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:21,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 63 [2022-01-28 14:56:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:21,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784559460] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:21,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:21,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:56:21,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624673380] [2022-01-28 14:56:21,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:21,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:56:21,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:21,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:56:21,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:21,378 INFO L87 Difference]: Start difference. First operand 1683 states and 5670 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:23,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:23,071 INFO L93 Difference]: Finished difference Result 2389 states and 7481 transitions. [2022-01-28 14:56:23,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-28 14:56:23,072 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:23,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:23,075 INFO L225 Difference]: With dead ends: 2389 [2022-01-28 14:56:23,076 INFO L226 Difference]: Without dead ends: 2185 [2022-01-28 14:56:23,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=293, Invalid=1429, Unknown=0, NotChecked=0, Total=1722 [2022-01-28 14:56:23,076 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 246 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:23,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 384 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1218 Invalid, 0 Unknown, 63 Unchecked, 0.5s Time] [2022-01-28 14:56:23,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2022-01-28 14:56:23,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 1684. [2022-01-28 14:56:23,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 3.3713606654783126) internal successors, (5674), 1683 states have internal predecessors, (5674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:23,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5674 transitions. [2022-01-28 14:56:23,100 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5674 transitions. Word has length 24 [2022-01-28 14:56:23,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:23,100 INFO L470 AbstractCegarLoop]: Abstraction has 1684 states and 5674 transitions. [2022-01-28 14:56:23,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5674 transitions. [2022-01-28 14:56:23,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:23,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:23,102 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:23,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:23,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:23,303 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:23,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:23,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1722283241, now seen corresponding path program 225 times [2022-01-28 14:56:23,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:23,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237131225] [2022-01-28 14:56:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:23,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:23,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:23,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237131225] [2022-01-28 14:56:23,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237131225] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:23,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452016956] [2022-01-28 14:56:23,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:56:23,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:23,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:23,518 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:23,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-01-28 14:56:23,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 14:56:23,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:23,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:23,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:23,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:23,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:56:23,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:23,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:23,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:23,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:56:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:23,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:24,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:24,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2022-01-28 14:56:24,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:24,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2022-01-28 14:56:24,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:24,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2022-01-28 14:56:24,645 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:24,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452016956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:24,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:24,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:56:24,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119395067] [2022-01-28 14:56:24,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:24,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:56:24,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:24,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:56:24,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:24,646 INFO L87 Difference]: Start difference. First operand 1684 states and 5674 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:25,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:25,014 INFO L93 Difference]: Finished difference Result 1762 states and 5910 transitions. [2022-01-28 14:56:25,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:56:25,014 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:25,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:25,017 INFO L225 Difference]: With dead ends: 1762 [2022-01-28 14:56:25,018 INFO L226 Difference]: Without dead ends: 1731 [2022-01-28 14:56:25,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:56:25,018 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:25,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 199 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 679 Invalid, 0 Unknown, 289 Unchecked, 0.2s Time] [2022-01-28 14:56:25,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2022-01-28 14:56:25,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1691. [2022-01-28 14:56:25,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 3.37396449704142) internal successors, (5702), 1690 states have internal predecessors, (5702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:25,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 5702 transitions. [2022-01-28 14:56:25,037 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 5702 transitions. Word has length 24 [2022-01-28 14:56:25,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:25,037 INFO L470 AbstractCegarLoop]: Abstraction has 1691 states and 5702 transitions. [2022-01-28 14:56:25,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:25,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 5702 transitions. [2022-01-28 14:56:25,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:25,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:25,039 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:25,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:25,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:25,240 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:25,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1024119881, now seen corresponding path program 226 times [2022-01-28 14:56:25,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:25,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678381560] [2022-01-28 14:56:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:25,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:25,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:25,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678381560] [2022-01-28 14:56:25,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678381560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:25,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281041882] [2022-01-28 14:56:25,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:56:25,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:25,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:25,449 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:25,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-01-28 14:56:25,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:56:25,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:25,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:25,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:25,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:56:25,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:56:25,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:56:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:25,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:26,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:26,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:56:26,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:26,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 108 [2022-01-28 14:56:26,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:26,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 80 [2022-01-28 14:56:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:26,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281041882] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:26,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:26,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:56:26,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269635871] [2022-01-28 14:56:26,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:26,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:56:26,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:26,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:56:26,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:56:26,569 INFO L87 Difference]: Start difference. First operand 1691 states and 5702 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:26,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:26,966 INFO L93 Difference]: Finished difference Result 1842 states and 6092 transitions. [2022-01-28 14:56:26,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:56:26,967 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:26,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:26,970 INFO L225 Difference]: With dead ends: 1842 [2022-01-28 14:56:26,970 INFO L226 Difference]: Without dead ends: 1780 [2022-01-28 14:56:26,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:26,970 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:26,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 247 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:56:26,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2022-01-28 14:56:26,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1688. [2022-01-28 14:56:26,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 3.3692946058091287) internal successors, (5684), 1687 states have internal predecessors, (5684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 5684 transitions. [2022-01-28 14:56:26,989 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 5684 transitions. Word has length 24 [2022-01-28 14:56:26,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:26,989 INFO L470 AbstractCegarLoop]: Abstraction has 1688 states and 5684 transitions. [2022-01-28 14:56:26,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:26,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 5684 transitions. [2022-01-28 14:56:26,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:26,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:26,992 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:27,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-01-28 14:56:27,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:27,192 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:27,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:27,192 INFO L85 PathProgramCache]: Analyzing trace with hash 539717111, now seen corresponding path program 227 times [2022-01-28 14:56:27,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:27,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367662344] [2022-01-28 14:56:27,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:27,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:27,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:27,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367662344] [2022-01-28 14:56:27,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367662344] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:27,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251846425] [2022-01-28 14:56:27,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:56:27,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:27,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:27,374 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:27,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-01-28 14:56:27,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:56:27,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:27,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:27,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:27,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:27,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:56:27,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:27,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-01-28 14:56:27,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:27,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 14:56:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:27,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:28,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:28,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:56:28,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:28,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 108 [2022-01-28 14:56:28,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:28,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 80 [2022-01-28 14:56:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:28,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251846425] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:28,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:28,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:56:28,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917592483] [2022-01-28 14:56:28,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:28,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:56:28,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:28,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:56:28,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:56:28,658 INFO L87 Difference]: Start difference. First operand 1688 states and 5684 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:28,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:28,982 INFO L93 Difference]: Finished difference Result 1782 states and 5936 transitions. [2022-01-28 14:56:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:56:28,983 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:28,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:28,986 INFO L225 Difference]: With dead ends: 1782 [2022-01-28 14:56:28,986 INFO L226 Difference]: Without dead ends: 1747 [2022-01-28 14:56:28,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:56:28,986 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:28,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 258 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 682 Invalid, 0 Unknown, 110 Unchecked, 0.3s Time] [2022-01-28 14:56:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2022-01-28 14:56:29,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1688. [2022-01-28 14:56:29,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 3.3692946058091287) internal successors, (5684), 1687 states have internal predecessors, (5684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:29,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 5684 transitions. [2022-01-28 14:56:29,005 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 5684 transitions. Word has length 24 [2022-01-28 14:56:29,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:29,005 INFO L470 AbstractCegarLoop]: Abstraction has 1688 states and 5684 transitions. [2022-01-28 14:56:29,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:29,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 5684 transitions. [2022-01-28 14:56:29,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:29,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:29,007 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:29,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:29,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:29,208 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:29,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:29,208 INFO L85 PathProgramCache]: Analyzing trace with hash -479321271, now seen corresponding path program 228 times [2022-01-28 14:56:29,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:29,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250735147] [2022-01-28 14:56:29,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:29,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:29,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:29,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:29,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250735147] [2022-01-28 14:56:29,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250735147] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:29,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024575194] [2022-01-28 14:56:29,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:56:29,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:29,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:29,360 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:29,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-01-28 14:56:29,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:56:29,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:29,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:56:29,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:29,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:56:29,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:56:29,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 14:56:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:29,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:29,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:29,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 84 [2022-01-28 14:56:30,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:30,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 93 [2022-01-28 14:56:30,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:30,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 71 [2022-01-28 14:56:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:30,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024575194] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:30,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:30,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:56:30,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025020607] [2022-01-28 14:56:30,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:30,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:56:30,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:30,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:56:30,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:56:30,258 INFO L87 Difference]: Start difference. First operand 1688 states and 5684 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:30,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:30,751 INFO L93 Difference]: Finished difference Result 1858 states and 6149 transitions. [2022-01-28 14:56:30,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:56:30,752 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:30,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:30,755 INFO L225 Difference]: With dead ends: 1858 [2022-01-28 14:56:30,755 INFO L226 Difference]: Without dead ends: 1780 [2022-01-28 14:56:30,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:56:30,755 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:30,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 239 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:56:30,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2022-01-28 14:56:30,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1695. [2022-01-28 14:56:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 3.3665879574970483) internal successors, (5703), 1694 states have internal predecessors, (5703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 5703 transitions. [2022-01-28 14:56:30,774 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 5703 transitions. Word has length 24 [2022-01-28 14:56:30,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:30,774 INFO L470 AbstractCegarLoop]: Abstraction has 1695 states and 5703 transitions. [2022-01-28 14:56:30,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 5703 transitions. [2022-01-28 14:56:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:30,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:30,777 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:30,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-01-28 14:56:30,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:30,977 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:30,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:30,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1577746675, now seen corresponding path program 229 times [2022-01-28 14:56:30,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:30,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505860420] [2022-01-28 14:56:30,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:30,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:31,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:31,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505860420] [2022-01-28 14:56:31,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505860420] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:31,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400804939] [2022-01-28 14:56:31,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:56:31,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:31,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:31,154 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:31,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-01-28 14:56:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:31,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:31,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:31,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:31,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:56:31,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:31,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:56:31,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:31,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:56:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:31,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:31,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:31,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2022-01-28 14:56:32,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:32,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 114 [2022-01-28 14:56:32,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:32,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 86 [2022-01-28 14:56:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:32,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400804939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:32,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:32,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:56:32,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209478876] [2022-01-28 14:56:32,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:32,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:56:32,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:32,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:56:32,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:56:32,196 INFO L87 Difference]: Start difference. First operand 1695 states and 5703 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:32,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:32,609 INFO L93 Difference]: Finished difference Result 1791 states and 5962 transitions. [2022-01-28 14:56:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:56:32,610 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:32,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:32,613 INFO L225 Difference]: With dead ends: 1791 [2022-01-28 14:56:32,613 INFO L226 Difference]: Without dead ends: 1756 [2022-01-28 14:56:32,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:56:32,613 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:32,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 246 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 754 Invalid, 0 Unknown, 126 Unchecked, 0.3s Time] [2022-01-28 14:56:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2022-01-28 14:56:32,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1693. [2022-01-28 14:56:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1692 states have (on average 3.367612293144208) internal successors, (5698), 1692 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 5698 transitions. [2022-01-28 14:56:32,632 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 5698 transitions. Word has length 24 [2022-01-28 14:56:32,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:32,632 INFO L470 AbstractCegarLoop]: Abstraction has 1693 states and 5698 transitions. [2022-01-28 14:56:32,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:32,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 5698 transitions. [2022-01-28 14:56:32,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:32,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:32,634 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:32,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-01-28 14:56:32,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:32,835 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:32,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:32,835 INFO L85 PathProgramCache]: Analyzing trace with hash -594841985, now seen corresponding path program 230 times [2022-01-28 14:56:32,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:32,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89413388] [2022-01-28 14:56:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:32,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:33,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:33,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89413388] [2022-01-28 14:56:33,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89413388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:33,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619404516] [2022-01-28 14:56:33,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:56:33,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:33,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:33,036 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:33,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-01-28 14:56:33,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:56:33,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:33,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:56:33,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:33,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:33,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-28 14:56:33,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:33,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:56:33,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:33,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:56:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:33,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:33,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:33,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 51 [2022-01-28 14:56:33,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:33,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 93 [2022-01-28 14:56:33,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:33,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 71 [2022-01-28 14:56:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:34,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619404516] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:34,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:34,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:56:34,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257226046] [2022-01-28 14:56:34,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:34,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:56:34,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:34,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:56:34,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:56:34,008 INFO L87 Difference]: Start difference. First operand 1693 states and 5698 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:34,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:34,598 INFO L93 Difference]: Finished difference Result 1990 states and 6424 transitions. [2022-01-28 14:56:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:56:34,598 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:34,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:34,601 INFO L225 Difference]: With dead ends: 1990 [2022-01-28 14:56:34,601 INFO L226 Difference]: Without dead ends: 1861 [2022-01-28 14:56:34,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:56:34,601 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 97 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:34,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 325 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 831 Invalid, 0 Unknown, 101 Unchecked, 0.3s Time] [2022-01-28 14:56:34,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2022-01-28 14:56:34,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1691. [2022-01-28 14:56:34,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 3.3686390532544377) internal successors, (5693), 1690 states have internal predecessors, (5693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:34,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 5693 transitions. [2022-01-28 14:56:34,622 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 5693 transitions. Word has length 24 [2022-01-28 14:56:34,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:34,622 INFO L470 AbstractCegarLoop]: Abstraction has 1691 states and 5693 transitions. [2022-01-28 14:56:34,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:34,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 5693 transitions. [2022-01-28 14:56:34,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:34,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:34,624 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:34,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-01-28 14:56:34,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-01-28 14:56:34,835 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:34,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:34,835 INFO L85 PathProgramCache]: Analyzing trace with hash -2095155597, now seen corresponding path program 231 times [2022-01-28 14:56:34,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:34,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650290373] [2022-01-28 14:56:34,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:34,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:34,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:34,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650290373] [2022-01-28 14:56:34,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650290373] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:34,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671239293] [2022-01-28 14:56:34,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:56:34,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:34,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:34,986 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:34,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-01-28 14:56:35,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:56:35,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:35,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:35,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:35,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:56:35,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:35,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:56:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:35,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:35,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:35,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:56:35,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:35,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:56:35,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:35,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:56:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:35,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671239293] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:35,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:35,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:56:35,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102758677] [2022-01-28 14:56:35,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:35,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:56:35,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:35,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:56:35,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:35,906 INFO L87 Difference]: Start difference. First operand 1691 states and 5693 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:36,693 INFO L93 Difference]: Finished difference Result 2038 states and 6733 transitions. [2022-01-28 14:56:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:56:36,693 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:36,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:36,697 INFO L225 Difference]: With dead ends: 2038 [2022-01-28 14:56:36,697 INFO L226 Difference]: Without dead ends: 1976 [2022-01-28 14:56:36,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:56:36,697 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 132 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:36,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 241 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:56:36,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2022-01-28 14:56:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1710. [2022-01-28 14:56:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 3.369221767115272) internal successors, (5758), 1709 states have internal predecessors, (5758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:36,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5758 transitions. [2022-01-28 14:56:36,718 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5758 transitions. Word has length 24 [2022-01-28 14:56:36,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:36,719 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 5758 transitions. [2022-01-28 14:56:36,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:36,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5758 transitions. [2022-01-28 14:56:36,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:36,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:36,721 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:36,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-01-28 14:56:36,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-01-28 14:56:36,921 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:36,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:36,921 INFO L85 PathProgramCache]: Analyzing trace with hash -931222423, now seen corresponding path program 232 times [2022-01-28 14:56:36,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:36,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357265742] [2022-01-28 14:56:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:36,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:37,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:37,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357265742] [2022-01-28 14:56:37,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357265742] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:37,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405284486] [2022-01-28 14:56:37,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:56:37,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:37,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:37,081 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:37,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-01-28 14:56:37,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:56:37,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:37,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:37,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:37,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:37,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:56:37,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:37,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:56:37,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:37,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:56:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:37,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:37,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:37,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:56:38,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:38,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:56:38,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:38,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:56:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:38,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405284486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:38,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:38,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:56:38,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223809267] [2022-01-28 14:56:38,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:38,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:56:38,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:38,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:56:38,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:38,137 INFO L87 Difference]: Start difference. First operand 1710 states and 5758 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:38,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:38,379 INFO L93 Difference]: Finished difference Result 1807 states and 6041 transitions. [2022-01-28 14:56:38,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:56:38,379 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:38,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:38,382 INFO L225 Difference]: With dead ends: 1807 [2022-01-28 14:56:38,382 INFO L226 Difference]: Without dead ends: 1772 [2022-01-28 14:56:38,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:38,383 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:38,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 202 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 619 Invalid, 0 Unknown, 12 Unchecked, 0.2s Time] [2022-01-28 14:56:38,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2022-01-28 14:56:38,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1713. [2022-01-28 14:56:38,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1712 states have (on average 3.369158878504673) internal successors, (5768), 1712 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:38,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 5768 transitions. [2022-01-28 14:56:38,401 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 5768 transitions. Word has length 24 [2022-01-28 14:56:38,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:38,401 INFO L470 AbstractCegarLoop]: Abstraction has 1713 states and 5768 transitions. [2022-01-28 14:56:38,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:38,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 5768 transitions. [2022-01-28 14:56:38,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:38,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:38,404 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:38,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-01-28 14:56:38,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2022-01-28 14:56:38,604 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:38,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:38,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2005835981, now seen corresponding path program 233 times [2022-01-28 14:56:38,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:38,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363617175] [2022-01-28 14:56:38,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:38,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:38,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:38,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363617175] [2022-01-28 14:56:38,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363617175] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:38,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424147386] [2022-01-28 14:56:38,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:56:38,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:38,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:38,772 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:38,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-01-28 14:56:38,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:56:38,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:38,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:38,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:38,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:38,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:56:39,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:39,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:39,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:39,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:56:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:39,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:39,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:39,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:56:39,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:39,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:56:39,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:39,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:56:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:40,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424147386] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:40,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:40,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:56:40,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360488022] [2022-01-28 14:56:40,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:40,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:40,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:40,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:40,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:40,012 INFO L87 Difference]: Start difference. First operand 1713 states and 5768 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:40,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:40,222 INFO L93 Difference]: Finished difference Result 1803 states and 6037 transitions. [2022-01-28 14:56:40,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:56:40,222 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:40,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:40,225 INFO L225 Difference]: With dead ends: 1803 [2022-01-28 14:56:40,225 INFO L226 Difference]: Without dead ends: 1772 [2022-01-28 14:56:40,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:56:40,225 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:40,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 154 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 426 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-01-28 14:56:40,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2022-01-28 14:56:40,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1713. [2022-01-28 14:56:40,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1712 states have (on average 3.369158878504673) internal successors, (5768), 1712 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:40,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 5768 transitions. [2022-01-28 14:56:40,244 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 5768 transitions. Word has length 24 [2022-01-28 14:56:40,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:40,244 INFO L470 AbstractCegarLoop]: Abstraction has 1713 states and 5768 transitions. [2022-01-28 14:56:40,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:40,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 5768 transitions. [2022-01-28 14:56:40,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:40,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:40,246 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:40,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:40,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:40,447 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:40,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:40,447 INFO L85 PathProgramCache]: Analyzing trace with hash -647549339, now seen corresponding path program 234 times [2022-01-28 14:56:40,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:40,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762433515] [2022-01-28 14:56:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:40,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:40,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:40,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762433515] [2022-01-28 14:56:40,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762433515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:40,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904088829] [2022-01-28 14:56:40,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:56:40,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:40,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:40,635 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:40,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-01-28 14:56:40,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:56:40,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:40,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:40,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:40,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:40,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:56:40,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:40,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:56:40,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:40,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:56:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:41,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:41,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:41,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2022-01-28 14:56:41,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:41,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:56:41,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:41,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:56:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:41,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904088829] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:41,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:41,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:56:41,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573585410] [2022-01-28 14:56:41,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:41,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:56:41,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:41,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:56:41,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:41,790 INFO L87 Difference]: Start difference. First operand 1713 states and 5768 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:42,115 INFO L93 Difference]: Finished difference Result 1851 states and 6148 transitions. [2022-01-28 14:56:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:56:42,115 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:42,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:42,118 INFO L225 Difference]: With dead ends: 1851 [2022-01-28 14:56:42,118 INFO L226 Difference]: Without dead ends: 1785 [2022-01-28 14:56:42,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:56:42,119 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:42,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 186 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 502 Invalid, 0 Unknown, 102 Unchecked, 0.2s Time] [2022-01-28 14:56:42,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2022-01-28 14:56:42,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1713. [2022-01-28 14:56:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1712 states have (on average 3.369158878504673) internal successors, (5768), 1712 states have internal predecessors, (5768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:42,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 5768 transitions. [2022-01-28 14:56:42,139 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 5768 transitions. Word has length 24 [2022-01-28 14:56:42,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:42,139 INFO L470 AbstractCegarLoop]: Abstraction has 1713 states and 5768 transitions. [2022-01-28 14:56:42,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:42,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 5768 transitions. [2022-01-28 14:56:42,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:42,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:42,141 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:42,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-01-28 14:56:42,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-01-28 14:56:42,341 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:42,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:42,342 INFO L85 PathProgramCache]: Analyzing trace with hash 843380829, now seen corresponding path program 235 times [2022-01-28 14:56:42,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:42,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374037541] [2022-01-28 14:56:42,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:42,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:42,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:42,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374037541] [2022-01-28 14:56:42,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374037541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:42,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795289188] [2022-01-28 14:56:42,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:56:42,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:42,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:42,486 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:42,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-01-28 14:56:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:42,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:56:42,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:42,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:56:42,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:56:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:42,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:43,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:43,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:56:43,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:43,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:56:43,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:43,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:56:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:43,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795289188] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:43,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:43,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:56:43,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634107065] [2022-01-28 14:56:43,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:43,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:56:43,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:43,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:56:43,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:56:43,443 INFO L87 Difference]: Start difference. First operand 1713 states and 5768 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:43,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:43,963 INFO L93 Difference]: Finished difference Result 2042 states and 6711 transitions. [2022-01-28 14:56:43,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:56:43,963 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:43,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:43,967 INFO L225 Difference]: With dead ends: 2042 [2022-01-28 14:56:43,967 INFO L226 Difference]: Without dead ends: 1928 [2022-01-28 14:56:43,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:56:43,967 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 88 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:43,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 237 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:56:43,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2022-01-28 14:56:43,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1727. [2022-01-28 14:56:43,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 3.3661645422943223) internal successors, (5810), 1726 states have internal predecessors, (5810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:43,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 5810 transitions. [2022-01-28 14:56:43,996 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 5810 transitions. Word has length 24 [2022-01-28 14:56:43,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:43,996 INFO L470 AbstractCegarLoop]: Abstraction has 1727 states and 5810 transitions. [2022-01-28 14:56:43,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:43,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 5810 transitions. [2022-01-28 14:56:43,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:43,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:43,998 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:44,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-01-28 14:56:44,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:44,198 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:44,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:44,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1600561663, now seen corresponding path program 236 times [2022-01-28 14:56:44,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:44,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118316348] [2022-01-28 14:56:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:44,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:44,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:44,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118316348] [2022-01-28 14:56:44,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118316348] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:44,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884789043] [2022-01-28 14:56:44,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:56:44,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:44,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:44,357 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:44,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-01-28 14:56:44,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:56:44,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:44,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:44,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:44,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:56:44,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:56:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:44,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:45,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:45,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:56:45,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:45,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:56:45,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:45,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:56:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:45,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884789043] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:45,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:45,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:56:45,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221722720] [2022-01-28 14:56:45,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:45,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:56:45,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:45,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:56:45,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:56:45,261 INFO L87 Difference]: Start difference. First operand 1727 states and 5810 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:45,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:45,642 INFO L93 Difference]: Finished difference Result 1925 states and 6404 transitions. [2022-01-28 14:56:45,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:56:45,642 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:45,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:45,645 INFO L225 Difference]: With dead ends: 1925 [2022-01-28 14:56:45,645 INFO L226 Difference]: Without dead ends: 1894 [2022-01-28 14:56:45,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:56:45,645 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 60 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:45,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 211 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:56:45,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2022-01-28 14:56:45,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1720. [2022-01-28 14:56:45,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1719 states have (on average 3.367655613728912) internal successors, (5789), 1719 states have internal predecessors, (5789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:45,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 5789 transitions. [2022-01-28 14:56:45,665 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 5789 transitions. Word has length 24 [2022-01-28 14:56:45,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:45,665 INFO L470 AbstractCegarLoop]: Abstraction has 1720 states and 5789 transitions. [2022-01-28 14:56:45,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:45,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 5789 transitions. [2022-01-28 14:56:45,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:45,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:45,668 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:45,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:45,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:45,868 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:45,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:45,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1068770537, now seen corresponding path program 237 times [2022-01-28 14:56:45,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:45,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412166573] [2022-01-28 14:56:45,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:45,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:45,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:45,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412166573] [2022-01-28 14:56:45,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412166573] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:45,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405514616] [2022-01-28 14:56:45,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:56:45,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:45,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:45,987 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:45,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-01-28 14:56:46,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:56:46,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:46,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:46,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:46,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:46,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:56:46,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:46,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:46,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:46,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:56:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:46,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:46,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:46,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 107 [2022-01-28 14:56:46,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:46,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:56:46,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:46,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:56:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:46,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405514616] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:46,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:46,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:56:46,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190880337] [2022-01-28 14:56:46,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:46,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:56:46,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:46,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:56:46,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:46,961 INFO L87 Difference]: Start difference. First operand 1720 states and 5789 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:47,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:47,198 INFO L93 Difference]: Finished difference Result 1817 states and 6079 transitions. [2022-01-28 14:56:47,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:56:47,199 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:47,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:47,202 INFO L225 Difference]: With dead ends: 1817 [2022-01-28 14:56:47,202 INFO L226 Difference]: Without dead ends: 1786 [2022-01-28 14:56:47,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:56:47,202 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:47,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 229 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 583 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-01-28 14:56:47,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2022-01-28 14:56:47,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1734. [2022-01-28 14:56:47,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.368724754760531) internal successors, (5838), 1733 states have internal predecessors, (5838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:47,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5838 transitions. [2022-01-28 14:56:47,223 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5838 transitions. Word has length 24 [2022-01-28 14:56:47,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:47,223 INFO L470 AbstractCegarLoop]: Abstraction has 1734 states and 5838 transitions. [2022-01-28 14:56:47,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:47,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5838 transitions. [2022-01-28 14:56:47,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:47,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:47,226 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:47,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:47,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:47,426 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:47,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:47,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1655686139, now seen corresponding path program 238 times [2022-01-28 14:56:47,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:47,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152878896] [2022-01-28 14:56:47,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:47,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:47,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:47,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152878896] [2022-01-28 14:56:47,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152878896] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:47,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006426306] [2022-01-28 14:56:47,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:56:47,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:47,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:47,547 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:47,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-01-28 14:56:47,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:56:47,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:47,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:47,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:47,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:47,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:56:47,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:47,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:56:47,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:47,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:56:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:47,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:48,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:48,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:56:48,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:48,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:56:48,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:48,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:56:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:48,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006426306] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:48,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:48,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:56:48,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092085948] [2022-01-28 14:56:48,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:48,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:56:48,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:48,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:56:48,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:48,513 INFO L87 Difference]: Start difference. First operand 1734 states and 5838 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:48,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:48,662 INFO L93 Difference]: Finished difference Result 1869 states and 6238 transitions. [2022-01-28 14:56:48,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:56:48,662 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:48,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:48,665 INFO L225 Difference]: With dead ends: 1869 [2022-01-28 14:56:48,665 INFO L226 Difference]: Without dead ends: 1838 [2022-01-28 14:56:48,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:48,665 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 60 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:48,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 257 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 395 Invalid, 0 Unknown, 372 Unchecked, 0.1s Time] [2022-01-28 14:56:48,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2022-01-28 14:56:48,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1744. [2022-01-28 14:56:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 3.3711990820424553) internal successors, (5876), 1743 states have internal predecessors, (5876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:48,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 5876 transitions. [2022-01-28 14:56:48,685 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 5876 transitions. Word has length 24 [2022-01-28 14:56:48,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:48,685 INFO L470 AbstractCegarLoop]: Abstraction has 1744 states and 5876 transitions. [2022-01-28 14:56:48,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:48,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 5876 transitions. [2022-01-28 14:56:48,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:48,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:48,687 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:48,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-01-28 14:56:48,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:48,888 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:48,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:48,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1200811695, now seen corresponding path program 239 times [2022-01-28 14:56:48,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:48,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909048737] [2022-01-28 14:56:48,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:48,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:49,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:49,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909048737] [2022-01-28 14:56:49,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909048737] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:49,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916440183] [2022-01-28 14:56:49,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:56:49,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:49,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:49,009 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:49,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-01-28 14:56:49,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:56:49,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:49,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:49,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:49,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:49,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:56:49,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:49,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:49,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:49,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:56:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:49,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:49,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:49,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:56:49,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:49,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:56:49,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:49,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:56:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:49,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916440183] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:49,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:49,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:56:49,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794182367] [2022-01-28 14:56:49,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:49,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:56:49,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:49,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:56:49,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:49,859 INFO L87 Difference]: Start difference. First operand 1744 states and 5876 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:50,032 INFO L93 Difference]: Finished difference Result 1875 states and 6262 transitions. [2022-01-28 14:56:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:56:50,032 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:50,035 INFO L225 Difference]: With dead ends: 1875 [2022-01-28 14:56:50,035 INFO L226 Difference]: Without dead ends: 1844 [2022-01-28 14:56:50,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:56:50,036 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 82 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:50,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 152 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 387 Invalid, 0 Unknown, 232 Unchecked, 0.1s Time] [2022-01-28 14:56:50,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2022-01-28 14:56:50,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1737. [2022-01-28 14:56:50,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 3.372119815668203) internal successors, (5854), 1736 states have internal predecessors, (5854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 5854 transitions. [2022-01-28 14:56:50,056 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 5854 transitions. Word has length 24 [2022-01-28 14:56:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:50,056 INFO L470 AbstractCegarLoop]: Abstraction has 1737 states and 5854 transitions. [2022-01-28 14:56:50,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:50,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 5854 transitions. [2022-01-28 14:56:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:50,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:50,059 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:50,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:50,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:50,261 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:50,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:50,261 INFO L85 PathProgramCache]: Analyzing trace with hash -613896093, now seen corresponding path program 240 times [2022-01-28 14:56:50,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:50,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634801948] [2022-01-28 14:56:50,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:50,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:50,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:50,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634801948] [2022-01-28 14:56:50,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634801948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:50,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291236430] [2022-01-28 14:56:50,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:56:50,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:50,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:50,381 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:50,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-01-28 14:56:50,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:56:50,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:50,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:50,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:50,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:50,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:56:50,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:50,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:50,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:50,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:56:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:50,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:51,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:51,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2022-01-28 14:56:51,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:51,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:56:51,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:51,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:56:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:51,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291236430] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:51,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:51,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:56:51,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810201013] [2022-01-28 14:56:51,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:51,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:56:51,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:51,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:56:51,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:51,300 INFO L87 Difference]: Start difference. First operand 1737 states and 5854 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:51,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:51,429 INFO L93 Difference]: Finished difference Result 1827 states and 6106 transitions. [2022-01-28 14:56:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:56:51,430 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:51,433 INFO L225 Difference]: With dead ends: 1827 [2022-01-28 14:56:51,433 INFO L226 Difference]: Without dead ends: 1820 [2022-01-28 14:56:51,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:56:51,434 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:51,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 168 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 273 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-01-28 14:56:51,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2022-01-28 14:56:51,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1741. [2022-01-28 14:56:51,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 3.37183908045977) internal successors, (5867), 1740 states have internal predecessors, (5867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 5867 transitions. [2022-01-28 14:56:51,454 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 5867 transitions. Word has length 24 [2022-01-28 14:56:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:51,454 INFO L470 AbstractCegarLoop]: Abstraction has 1741 states and 5867 transitions. [2022-01-28 14:56:51,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 5867 transitions. [2022-01-28 14:56:51,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:51,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:51,456 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:51,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-01-28 14:56:51,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-01-28 14:56:51,659 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:51,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:51,659 INFO L85 PathProgramCache]: Analyzing trace with hash -820704059, now seen corresponding path program 241 times [2022-01-28 14:56:51,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:51,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422986275] [2022-01-28 14:56:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:51,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:56:51,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:51,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422986275] [2022-01-28 14:56:51,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422986275] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:51,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277418866] [2022-01-28 14:56:51,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:56:51,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:51,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:51,836 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:51,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-01-28 14:56:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:51,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:56:51,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:52,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:52,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:56:52,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:52,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:56:52,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:52,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:56:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:56:52,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:52,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:52,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:56:52,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:52,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:56:52,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:52,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:56:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:56:52,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277418866] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:52,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:52,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:56:52,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084270980] [2022-01-28 14:56:52,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:52,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:56:52,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:52,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:56:52,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:56:52,928 INFO L87 Difference]: Start difference. First operand 1741 states and 5867 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:53,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:53,149 INFO L93 Difference]: Finished difference Result 1863 states and 6182 transitions. [2022-01-28 14:56:53,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:56:53,150 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:53,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:53,153 INFO L225 Difference]: With dead ends: 1863 [2022-01-28 14:56:53,153 INFO L226 Difference]: Without dead ends: 1808 [2022-01-28 14:56:53,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:53,153 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:53,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 211 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 414 Invalid, 0 Unknown, 107 Unchecked, 0.2s Time] [2022-01-28 14:56:53,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2022-01-28 14:56:53,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1763. [2022-01-28 14:56:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 3.3637911464245174) internal successors, (5927), 1762 states have internal predecessors, (5927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 5927 transitions. [2022-01-28 14:56:53,173 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 5927 transitions. Word has length 24 [2022-01-28 14:56:53,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:53,173 INFO L470 AbstractCegarLoop]: Abstraction has 1763 states and 5927 transitions. [2022-01-28 14:56:53,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:53,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 5927 transitions. [2022-01-28 14:56:53,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:53,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:53,176 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:53,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-01-28 14:56:53,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-01-28 14:56:53,379 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:53,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:53,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1496085987, now seen corresponding path program 242 times [2022-01-28 14:56:53,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:53,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466648607] [2022-01-28 14:56:53,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:53,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:56:53,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:53,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466648607] [2022-01-28 14:56:53,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466648607] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:53,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844659824] [2022-01-28 14:56:53,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:56:53,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:53,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:53,533 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:53,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-01-28 14:56:53,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:56:53,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:53,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:53,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:53,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:53,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:56:53,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:53,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:56:53,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:53,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:56:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:56:53,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:54,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:54,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:56:54,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:54,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:56:54,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:54,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:56:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:56:54,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844659824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:54,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:54,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:56:54,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085824437] [2022-01-28 14:56:54,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:54,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:54,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:54,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:54,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:54,658 INFO L87 Difference]: Start difference. First operand 1763 states and 5927 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:54,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:54,811 INFO L93 Difference]: Finished difference Result 1885 states and 6248 transitions. [2022-01-28 14:56:54,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:56:54,811 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:54,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:54,814 INFO L225 Difference]: With dead ends: 1885 [2022-01-28 14:56:54,814 INFO L226 Difference]: Without dead ends: 1862 [2022-01-28 14:56:54,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:54,815 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 78 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:54,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 145 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 363 Invalid, 0 Unknown, 135 Unchecked, 0.1s Time] [2022-01-28 14:56:54,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2022-01-28 14:56:54,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1747. [2022-01-28 14:56:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 3.374570446735395) internal successors, (5892), 1746 states have internal predecessors, (5892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 5892 transitions. [2022-01-28 14:56:54,835 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 5892 transitions. Word has length 24 [2022-01-28 14:56:54,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:54,835 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 5892 transitions. [2022-01-28 14:56:54,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:54,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 5892 transitions. [2022-01-28 14:56:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:54,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:54,837 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:54,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-01-28 14:56:55,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-01-28 14:56:55,038 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:55,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:55,038 INFO L85 PathProgramCache]: Analyzing trace with hash 487009757, now seen corresponding path program 243 times [2022-01-28 14:56:55,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:55,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523018465] [2022-01-28 14:56:55,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:55,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:55,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:55,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:55,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523018465] [2022-01-28 14:56:55,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523018465] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:55,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274228640] [2022-01-28 14:56:55,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:56:55,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:55,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:55,241 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:55,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-01-28 14:56:55,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:56:55,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:55,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:55,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:55,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:55,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:56:55,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:55,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:56:55,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:55,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:56:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:55,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:56,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:56,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:56:56,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:56,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:56:56,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:56,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:56:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:56,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274228640] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:56,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:56,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:56:56,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982578654] [2022-01-28 14:56:56,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:56,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:56:56,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:56,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:56:56,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:56,312 INFO L87 Difference]: Start difference. First operand 1747 states and 5892 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:57,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:57,045 INFO L93 Difference]: Finished difference Result 1954 states and 6425 transitions. [2022-01-28 14:56:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:56:57,045 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:57,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:57,048 INFO L225 Difference]: With dead ends: 1954 [2022-01-28 14:56:57,048 INFO L226 Difference]: Without dead ends: 1834 [2022-01-28 14:56:57,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:56:57,049 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 105 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:57,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 257 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 802 Invalid, 0 Unknown, 211 Unchecked, 0.3s Time] [2022-01-28 14:56:57,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2022-01-28 14:56:57,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1748. [2022-01-28 14:56:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 3.3749284487693187) internal successors, (5896), 1747 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:57,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 5896 transitions. [2022-01-28 14:56:57,068 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 5896 transitions. Word has length 24 [2022-01-28 14:56:57,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:57,068 INFO L470 AbstractCegarLoop]: Abstraction has 1748 states and 5896 transitions. [2022-01-28 14:56:57,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:57,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 5896 transitions. [2022-01-28 14:56:57,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:57,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:57,070 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:57,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:57,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:57,271 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:57,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:57,271 INFO L85 PathProgramCache]: Analyzing trace with hash 371489043, now seen corresponding path program 244 times [2022-01-28 14:56:57,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:57,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871282011] [2022-01-28 14:56:57,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:57,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:57,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:57,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871282011] [2022-01-28 14:56:57,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871282011] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:57,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308451831] [2022-01-28 14:56:57,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:56:57,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:57,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:57,477 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:57,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-01-28 14:56:57,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:56:57,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:57,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:56:57,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:57,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:57,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:56:57,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:57,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:57,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:57,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:56:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:57,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:58,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:58,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2022-01-28 14:56:58,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:58,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:56:58,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:58,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:56:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:58,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308451831] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:58,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:58,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:56:58,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027594935] [2022-01-28 14:56:58,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:58,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:56:58,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:58,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:56:58,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:58,762 INFO L87 Difference]: Start difference. First operand 1748 states and 5896 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:59,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:59,340 INFO L93 Difference]: Finished difference Result 2039 states and 6656 transitions. [2022-01-28 14:56:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:56:59,340 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:56:59,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:59,343 INFO L225 Difference]: With dead ends: 2039 [2022-01-28 14:56:59,343 INFO L226 Difference]: Without dead ends: 1917 [2022-01-28 14:56:59,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:56:59,343 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 139 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:59,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 202 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 511 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2022-01-28 14:56:59,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2022-01-28 14:56:59,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1756. [2022-01-28 14:56:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 3.3777777777777778) internal successors, (5928), 1755 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:59,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 5928 transitions. [2022-01-28 14:56:59,364 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 5928 transitions. Word has length 24 [2022-01-28 14:56:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:59,364 INFO L470 AbstractCegarLoop]: Abstraction has 1756 states and 5928 transitions. [2022-01-28 14:56:59,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:59,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 5928 transitions. [2022-01-28 14:56:59,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:56:59,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:59,366 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:59,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:59,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-01-28 14:56:59,567 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:59,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:59,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1177075131, now seen corresponding path program 245 times [2022-01-28 14:56:59,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:59,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403945510] [2022-01-28 14:56:59,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:59,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:59,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:59,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403945510] [2022-01-28 14:56:59,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403945510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:59,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17747562] [2022-01-28 14:56:59,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:56:59,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:59,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:59,743 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:56:59,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-01-28 14:56:59,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:56:59,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:59,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:56:59,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:59,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:56:59,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:59,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:56:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:56:59,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:00,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:00,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2022-01-28 14:57:00,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:00,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:57:00,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:00,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:57:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:00,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17747562] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:00,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:00,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:57:00,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535002573] [2022-01-28 14:57:00,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:00,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:57:00,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:00,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:57:00,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:57:00,590 INFO L87 Difference]: Start difference. First operand 1756 states and 5928 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:01,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:01,340 INFO L93 Difference]: Finished difference Result 2257 states and 7332 transitions. [2022-01-28 14:57:01,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:57:01,340 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:01,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:01,344 INFO L225 Difference]: With dead ends: 2257 [2022-01-28 14:57:01,344 INFO L226 Difference]: Without dead ends: 2122 [2022-01-28 14:57:01,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:57:01,344 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 121 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:01,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 302 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:57:01,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2022-01-28 14:57:01,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1754. [2022-01-28 14:57:01,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 3.3696520250998288) internal successors, (5907), 1753 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 5907 transitions. [2022-01-28 14:57:01,366 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 5907 transitions. Word has length 24 [2022-01-28 14:57:01,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:01,366 INFO L470 AbstractCegarLoop]: Abstraction has 1754 states and 5907 transitions. [2022-01-28 14:57:01,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:01,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 5907 transitions. [2022-01-28 14:57:01,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:01,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:01,368 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:01,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-01-28 14:57:01,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2022-01-28 14:57:01,568 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:01,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:01,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1661477901, now seen corresponding path program 246 times [2022-01-28 14:57:01,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:01,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464399636] [2022-01-28 14:57:01,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:01,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:01,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:01,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464399636] [2022-01-28 14:57:01,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464399636] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:01,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254397723] [2022-01-28 14:57:01,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:57:01,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:01,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:01,717 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:01,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-01-28 14:57:01,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:57:01,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:01,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:57:01,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:01,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:57:01,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:57:01,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:57:01,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:57:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:02,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:02,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:02,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:57:02,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:02,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:57:02,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:02,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:57:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:02,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254397723] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:02,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:02,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:57:02,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345731674] [2022-01-28 14:57:02,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:02,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:57:02,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:02,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:57:02,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:57:02,633 INFO L87 Difference]: Start difference. First operand 1754 states and 5907 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:03,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:03,922 INFO L93 Difference]: Finished difference Result 2481 states and 7850 transitions. [2022-01-28 14:57:03,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-28 14:57:03,922 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:03,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:03,926 INFO L225 Difference]: With dead ends: 2481 [2022-01-28 14:57:03,926 INFO L226 Difference]: Without dead ends: 2305 [2022-01-28 14:57:03,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 14:57:03,926 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 165 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:03,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 455 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:57:03,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2022-01-28 14:57:03,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1751. [2022-01-28 14:57:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 3.376) internal successors, (5908), 1750 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:03,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 5908 transitions. [2022-01-28 14:57:03,950 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 5908 transitions. Word has length 24 [2022-01-28 14:57:03,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:03,950 INFO L470 AbstractCegarLoop]: Abstraction has 1751 states and 5908 transitions. [2022-01-28 14:57:03,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:03,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 5908 transitions. [2022-01-28 14:57:03,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:03,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:03,952 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:03,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-01-28 14:57:04,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:04,152 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:04,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:04,153 INFO L85 PathProgramCache]: Analyzing trace with hash 116185995, now seen corresponding path program 247 times [2022-01-28 14:57:04,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:04,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639162408] [2022-01-28 14:57:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:04,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:04,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:04,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639162408] [2022-01-28 14:57:04,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639162408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:04,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067243136] [2022-01-28 14:57:04,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:57:04,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:04,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:04,296 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:04,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-01-28 14:57:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:04,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:57:04,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:04,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:57:04,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:57:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:04,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:05,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:05,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 87 [2022-01-28 14:57:05,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:05,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:57:05,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:05,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:57:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:05,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067243136] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:05,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:05,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:57:05,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403766718] [2022-01-28 14:57:05,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:05,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:05,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:05,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:05,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:05,251 INFO L87 Difference]: Start difference. First operand 1751 states and 5908 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:05,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:05,676 INFO L93 Difference]: Finished difference Result 2124 states and 6982 transitions. [2022-01-28 14:57:05,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:57:05,676 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:05,680 INFO L225 Difference]: With dead ends: 2124 [2022-01-28 14:57:05,680 INFO L226 Difference]: Without dead ends: 2010 [2022-01-28 14:57:05,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:57:05,680 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 84 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:05,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 212 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 683 Invalid, 0 Unknown, 25 Unchecked, 0.3s Time] [2022-01-28 14:57:05,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2022-01-28 14:57:05,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1774. [2022-01-28 14:57:05,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 3.3705583756345177) internal successors, (5976), 1773 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:05,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 5976 transitions. [2022-01-28 14:57:05,702 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 5976 transitions. Word has length 24 [2022-01-28 14:57:05,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:05,702 INFO L470 AbstractCegarLoop]: Abstraction has 1774 states and 5976 transitions. [2022-01-28 14:57:05,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 5976 transitions. [2022-01-28 14:57:05,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:05,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:05,704 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:05,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2022-01-28 14:57:05,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:05,904 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:05,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:05,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1967210799, now seen corresponding path program 248 times [2022-01-28 14:57:05,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:05,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248760004] [2022-01-28 14:57:05,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:05,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:06,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:06,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248760004] [2022-01-28 14:57:06,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248760004] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:06,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192216163] [2022-01-28 14:57:06,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:57:06,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:06,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:06,053 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:06,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-01-28 14:57:06,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:57:06,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:06,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:57:06,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:06,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:57:06,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:57:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:06,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:06,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:06,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:57:06,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:06,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:57:06,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:06,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:57:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:06,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192216163] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:06,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:06,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:57:06,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398546714] [2022-01-28 14:57:06,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:06,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:06,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:06,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:06,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:06,988 INFO L87 Difference]: Start difference. First operand 1774 states and 5976 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:07,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:07,415 INFO L93 Difference]: Finished difference Result 2078 states and 6857 transitions. [2022-01-28 14:57:07,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:57:07,416 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:07,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:07,419 INFO L225 Difference]: With dead ends: 2078 [2022-01-28 14:57:07,419 INFO L226 Difference]: Without dead ends: 2021 [2022-01-28 14:57:07,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:57:07,419 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 74 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:07,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 256 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 853 Invalid, 0 Unknown, 150 Unchecked, 0.3s Time] [2022-01-28 14:57:07,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2022-01-28 14:57:07,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1763. [2022-01-28 14:57:07,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 3.3688989784335983) internal successors, (5936), 1762 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:07,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 5936 transitions. [2022-01-28 14:57:07,441 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 5936 transitions. Word has length 24 [2022-01-28 14:57:07,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:07,441 INFO L470 AbstractCegarLoop]: Abstraction has 1763 states and 5936 transitions. [2022-01-28 14:57:07,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:07,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 5936 transitions. [2022-01-28 14:57:07,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:07,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:07,443 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:07,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2022-01-28 14:57:07,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:07,644 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:07,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:07,644 INFO L85 PathProgramCache]: Analyzing trace with hash 341575703, now seen corresponding path program 249 times [2022-01-28 14:57:07,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:07,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989680265] [2022-01-28 14:57:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:07,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:07,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:07,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989680265] [2022-01-28 14:57:07,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989680265] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:07,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33992613] [2022-01-28 14:57:07,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:57:07,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:07,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:07,754 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:07,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-01-28 14:57:07,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:57:07,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:07,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:57:07,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:07,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:57:07,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:57:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:08,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:08,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:08,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:57:08,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:08,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:57:08,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:08,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:57:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:08,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33992613] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:08,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:08,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:57:08,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398726864] [2022-01-28 14:57:08,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:08,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:08,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:08,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:08,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:08,525 INFO L87 Difference]: Start difference. First operand 1763 states and 5936 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:08,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:08,755 INFO L93 Difference]: Finished difference Result 2029 states and 6722 transitions. [2022-01-28 14:57:08,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:57:08,756 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:08,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:08,759 INFO L225 Difference]: With dead ends: 2029 [2022-01-28 14:57:08,759 INFO L226 Difference]: Without dead ends: 1994 [2022-01-28 14:57:08,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:57:08,759 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 99 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:08,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 154 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 514 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2022-01-28 14:57:08,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2022-01-28 14:57:08,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1754. [2022-01-28 14:57:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 3.3679406731317743) internal successors, (5904), 1753 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:08,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 5904 transitions. [2022-01-28 14:57:08,779 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 5904 transitions. Word has length 24 [2022-01-28 14:57:08,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:08,779 INFO L470 AbstractCegarLoop]: Abstraction has 1754 states and 5904 transitions. [2022-01-28 14:57:08,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:08,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 5904 transitions. [2022-01-28 14:57:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:08,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:08,781 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:08,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-01-28 14:57:08,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:08,982 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:08,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:08,982 INFO L85 PathProgramCache]: Analyzing trace with hash 291174387, now seen corresponding path program 250 times [2022-01-28 14:57:08,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:08,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214188461] [2022-01-28 14:57:08,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:08,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:09,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:09,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214188461] [2022-01-28 14:57:09,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214188461] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:09,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380865611] [2022-01-28 14:57:09,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:57:09,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:09,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:09,123 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:09,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-01-28 14:57:09,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:57:09,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:09,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:57:09,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:09,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-01-28 14:57:09,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:57:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:09,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:09,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:09,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2022-01-28 14:57:09,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:09,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:57:09,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:09,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:57:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:09,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380865611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:09,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:09,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-01-28 14:57:09,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770686481] [2022-01-28 14:57:09,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:09,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:57:09,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:09,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:57:09,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:57:09,975 INFO L87 Difference]: Start difference. First operand 1754 states and 5904 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:10,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:10,377 INFO L93 Difference]: Finished difference Result 2252 states and 7428 transitions. [2022-01-28 14:57:10,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:57:10,377 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:10,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:10,381 INFO L225 Difference]: With dead ends: 2252 [2022-01-28 14:57:10,381 INFO L226 Difference]: Without dead ends: 2207 [2022-01-28 14:57:10,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:57:10,381 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 147 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:10,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 208 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:57:10,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2022-01-28 14:57:10,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1754. [2022-01-28 14:57:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 3.3679406731317743) internal successors, (5904), 1753 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:10,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 5904 transitions. [2022-01-28 14:57:10,404 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 5904 transitions. Word has length 24 [2022-01-28 14:57:10,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:10,404 INFO L470 AbstractCegarLoop]: Abstraction has 1754 states and 5904 transitions. [2022-01-28 14:57:10,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:10,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 5904 transitions. [2022-01-28 14:57:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:10,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:10,407 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:10,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:10,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-01-28 14:57:10,607 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:10,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:10,607 INFO L85 PathProgramCache]: Analyzing trace with hash 892806561, now seen corresponding path program 251 times [2022-01-28 14:57:10,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:10,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364451215] [2022-01-28 14:57:10,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:10,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:10,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:10,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:10,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364451215] [2022-01-28 14:57:10,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364451215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:10,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010662267] [2022-01-28 14:57:10,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:57:10,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:10,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:10,828 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:10,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-01-28 14:57:10,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:57:10,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:10,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:57:10,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:10,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:10,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:57:11,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:11,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:57:11,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:11,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:57:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:11,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:11,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:11,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-28 14:57:11,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:11,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:57:11,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:11,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:57:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:11,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010662267] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:11,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:11,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:57:12,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130693009] [2022-01-28 14:57:12,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:12,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:57:12,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:12,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:57:12,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:57:12,007 INFO L87 Difference]: Start difference. First operand 1754 states and 5904 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:12,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:12,578 INFO L93 Difference]: Finished difference Result 1948 states and 6429 transitions. [2022-01-28 14:57:12,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:57:12,579 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:12,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:12,582 INFO L225 Difference]: With dead ends: 1948 [2022-01-28 14:57:12,582 INFO L226 Difference]: Without dead ends: 1882 [2022-01-28 14:57:12,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:57:12,582 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 79 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:12,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 307 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 684 Invalid, 0 Unknown, 152 Unchecked, 0.3s Time] [2022-01-28 14:57:12,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2022-01-28 14:57:12,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1760. [2022-01-28 14:57:12,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 3.3706651506537804) internal successors, (5929), 1759 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:12,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 5929 transitions. [2022-01-28 14:57:12,603 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 5929 transitions. Word has length 24 [2022-01-28 14:57:12,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:12,603 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 5929 transitions. [2022-01-28 14:57:12,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:12,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 5929 transitions. [2022-01-28 14:57:12,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:12,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:12,605 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:12,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:12,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-01-28 14:57:12,806 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:12,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:12,806 INFO L85 PathProgramCache]: Analyzing trace with hash -205618843, now seen corresponding path program 252 times [2022-01-28 14:57:12,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:12,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459299338] [2022-01-28 14:57:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:12,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:12,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:13,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:13,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459299338] [2022-01-28 14:57:13,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459299338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:13,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284003495] [2022-01-28 14:57:13,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:57:13,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:13,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:13,023 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:13,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-01-28 14:57:13,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:57:13,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:13,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:57:13,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:13,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:13,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:57:13,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:13,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:57:13,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:13,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:57:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:13,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:14,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:14,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2022-01-28 14:57:14,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:14,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:57:14,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:14,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:57:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:14,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284003495] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:14,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:14,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:57:14,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565998417] [2022-01-28 14:57:14,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:14,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:57:14,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:14,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:57:14,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:57:14,364 INFO L87 Difference]: Start difference. First operand 1760 states and 5929 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:14,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:14,631 INFO L93 Difference]: Finished difference Result 1868 states and 6258 transitions. [2022-01-28 14:57:14,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:57:14,632 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:14,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:14,635 INFO L225 Difference]: With dead ends: 1868 [2022-01-28 14:57:14,635 INFO L226 Difference]: Without dead ends: 1837 [2022-01-28 14:57:14,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:57:14,635 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 343 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:14,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 181 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 524 Invalid, 0 Unknown, 343 Unchecked, 0.2s Time] [2022-01-28 14:57:14,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1837 states. [2022-01-28 14:57:14,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1837 to 1764. [2022-01-28 14:57:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.373227453204765) internal successors, (5947), 1763 states have internal predecessors, (5947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 5947 transitions. [2022-01-28 14:57:14,663 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 5947 transitions. Word has length 24 [2022-01-28 14:57:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:14,663 INFO L470 AbstractCegarLoop]: Abstraction has 1764 states and 5947 transitions. [2022-01-28 14:57:14,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 5947 transitions. [2022-01-28 14:57:14,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:14,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:14,665 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:14,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:14,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:14,865 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:14,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:14,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1538790861, now seen corresponding path program 253 times [2022-01-28 14:57:14,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:14,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838883647] [2022-01-28 14:57:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:14,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:15,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:15,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838883647] [2022-01-28 14:57:15,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838883647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:15,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980182403] [2022-01-28 14:57:15,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:57:15,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:15,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:15,071 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:15,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-01-28 14:57:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:15,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:57:15,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:15,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:15,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:57:15,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:15,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:57:15,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:15,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:57:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:15,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:16,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:16,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 55 [2022-01-28 14:57:16,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:16,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:57:16,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:16,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:57:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:16,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980182403] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:16,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:16,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:57:16,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975315824] [2022-01-28 14:57:16,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:16,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:57:16,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:57:16,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:57:16,257 INFO L87 Difference]: Start difference. First operand 1764 states and 5947 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:19,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:19,227 INFO L93 Difference]: Finished difference Result 2813 states and 8547 transitions. [2022-01-28 14:57:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-28 14:57:19,227 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:19,231 INFO L225 Difference]: With dead ends: 2813 [2022-01-28 14:57:19,231 INFO L226 Difference]: Without dead ends: 2543 [2022-01-28 14:57:19,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=395, Invalid=2155, Unknown=0, NotChecked=0, Total=2550 [2022-01-28 14:57:19,232 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 319 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:19,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 486 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1195 Invalid, 0 Unknown, 63 Unchecked, 0.6s Time] [2022-01-28 14:57:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-01-28 14:57:19,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 1774. [2022-01-28 14:57:19,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 3.383530738860688) internal successors, (5999), 1773 states have internal predecessors, (5999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:19,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 5999 transitions. [2022-01-28 14:57:19,260 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 5999 transitions. Word has length 24 [2022-01-28 14:57:19,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:19,260 INFO L470 AbstractCegarLoop]: Abstraction has 1774 states and 5999 transitions. [2022-01-28 14:57:19,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:19,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 5999 transitions. [2022-01-28 14:57:19,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:19,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:19,262 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:19,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Ended with exit code 0 [2022-01-28 14:57:19,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-01-28 14:57:19,462 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:19,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:19,463 INFO L85 PathProgramCache]: Analyzing trace with hash 777285847, now seen corresponding path program 254 times [2022-01-28 14:57:19,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:19,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125763414] [2022-01-28 14:57:19,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:19,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:19,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:19,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125763414] [2022-01-28 14:57:19,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125763414] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:19,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246285711] [2022-01-28 14:57:19,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:57:19,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:19,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:19,674 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:19,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-01-28 14:57:19,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:57:19,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:19,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:57:19,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:19,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:19,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:57:20,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:20,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:20,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:20,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:57:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:20,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:20,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:20,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 55 [2022-01-28 14:57:20,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:20,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:57:21,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:21,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:57:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:21,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246285711] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:21,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:21,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:57:21,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336953663] [2022-01-28 14:57:21,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:21,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:57:21,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:21,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:57:21,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:57:21,028 INFO L87 Difference]: Start difference. First operand 1774 states and 5999 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:22,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:22,055 INFO L93 Difference]: Finished difference Result 2238 states and 7236 transitions. [2022-01-28 14:57:22,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:57:22,055 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:22,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:22,059 INFO L225 Difference]: With dead ends: 2238 [2022-01-28 14:57:22,059 INFO L226 Difference]: Without dead ends: 2085 [2022-01-28 14:57:22,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:57:22,059 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 184 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:22,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 258 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 694 Invalid, 0 Unknown, 124 Unchecked, 0.3s Time] [2022-01-28 14:57:22,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2022-01-28 14:57:22,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1775. [2022-01-28 14:57:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1774 states have (on average 3.3838782412626833) internal successors, (6003), 1774 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:22,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 6003 transitions. [2022-01-28 14:57:22,084 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 6003 transitions. Word has length 24 [2022-01-28 14:57:22,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:22,084 INFO L470 AbstractCegarLoop]: Abstraction has 1775 states and 6003 transitions. [2022-01-28 14:57:22,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:22,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 6003 transitions. [2022-01-28 14:57:22,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:22,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:22,086 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:22,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:22,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-01-28 14:57:22,287 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:22,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:22,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1443043937, now seen corresponding path program 255 times [2022-01-28 14:57:22,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:22,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280110951] [2022-01-28 14:57:22,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:22,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:57:22,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:22,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280110951] [2022-01-28 14:57:22,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280110951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:22,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195659123] [2022-01-28 14:57:22,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:57:22,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:22,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:22,476 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:22,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-01-28 14:57:22,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:57:22,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:22,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:57:22,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:22,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:22,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:57:22,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:22,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:22,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:22,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:57:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:57:22,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:23,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:23,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-28 14:57:23,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:23,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:57:23,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:23,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:57:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:57:23,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195659123] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:23,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:23,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:57:23,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052762658] [2022-01-28 14:57:23,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:23,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:57:23,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:23,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:57:23,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:57:23,740 INFO L87 Difference]: Start difference. First operand 1775 states and 6003 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:24,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:24,387 INFO L93 Difference]: Finished difference Result 2106 states and 6961 transitions. [2022-01-28 14:57:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:57:24,387 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:24,391 INFO L225 Difference]: With dead ends: 2106 [2022-01-28 14:57:24,391 INFO L226 Difference]: Without dead ends: 2004 [2022-01-28 14:57:24,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:57:24,391 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 117 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:24,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 228 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 688 Invalid, 0 Unknown, 18 Unchecked, 0.3s Time] [2022-01-28 14:57:24,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2022-01-28 14:57:24,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1797. [2022-01-28 14:57:24,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1796 states have (on average 3.3919821826280625) internal successors, (6092), 1796 states have internal predecessors, (6092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:24,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 6092 transitions. [2022-01-28 14:57:24,414 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 6092 transitions. Word has length 24 [2022-01-28 14:57:24,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:24,414 INFO L470 AbstractCegarLoop]: Abstraction has 1797 states and 6092 transitions. [2022-01-28 14:57:24,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:24,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 6092 transitions. [2022-01-28 14:57:24,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:24,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:24,416 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:24,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:24,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2022-01-28 14:57:24,617 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:24,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:24,617 INFO L85 PathProgramCache]: Analyzing trace with hash 336478001, now seen corresponding path program 256 times [2022-01-28 14:57:24,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:24,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483083423] [2022-01-28 14:57:24,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:24,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:24,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:24,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483083423] [2022-01-28 14:57:24,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483083423] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:24,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432065847] [2022-01-28 14:57:24,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:57:24,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:24,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:24,755 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:24,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-01-28 14:57:24,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:57:24,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:24,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:57:24,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:24,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:57:24,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:24,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:57:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:25,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:25,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:25,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2022-01-28 14:57:25,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:25,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:57:25,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:25,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:57:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:25,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432065847] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:25,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:25,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:57:25,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433003778] [2022-01-28 14:57:25,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:25,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:57:25,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:25,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:57:25,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:57:25,908 INFO L87 Difference]: Start difference. First operand 1797 states and 6092 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:26,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:26,751 INFO L93 Difference]: Finished difference Result 2759 states and 8969 transitions. [2022-01-28 14:57:26,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:57:26,751 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:26,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:26,756 INFO L225 Difference]: With dead ends: 2759 [2022-01-28 14:57:26,756 INFO L226 Difference]: Without dead ends: 2644 [2022-01-28 14:57:26,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:57:26,756 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 148 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:26,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 376 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:57:26,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2022-01-28 14:57:26,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1852. [2022-01-28 14:57:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 3.388438681793625) internal successors, (6272), 1851 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6272 transitions. [2022-01-28 14:57:26,782 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6272 transitions. Word has length 24 [2022-01-28 14:57:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:26,782 INFO L470 AbstractCegarLoop]: Abstraction has 1852 states and 6272 transitions. [2022-01-28 14:57:26,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6272 transitions. [2022-01-28 14:57:26,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:26,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:26,785 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:26,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:26,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:26,987 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:26,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:26,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1255681097, now seen corresponding path program 257 times [2022-01-28 14:57:26,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:26,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058260463] [2022-01-28 14:57:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:26,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:27,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:27,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058260463] [2022-01-28 14:57:27,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058260463] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:27,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525613458] [2022-01-28 14:57:27,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:57:27,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:27,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:27,183 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:27,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-01-28 14:57:27,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:57:27,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:27,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:57:27,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:27,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:57:27,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:57:27,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:57:27,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:57:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:27,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:27,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:27,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-01-28 14:57:27,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:27,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:57:27,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:27,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:57:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:27,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525613458] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:27,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:27,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:57:27,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909883174] [2022-01-28 14:57:27,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:27,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:57:27,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:27,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:57:27,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:57:27,985 INFO L87 Difference]: Start difference. First operand 1852 states and 6272 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:30,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:30,658 INFO L93 Difference]: Finished difference Result 3105 states and 9783 transitions. [2022-01-28 14:57:30,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-28 14:57:30,658 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:30,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:30,663 INFO L225 Difference]: With dead ends: 3105 [2022-01-28 14:57:30,663 INFO L226 Difference]: Without dead ends: 2898 [2022-01-28 14:57:30,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=415, Invalid=2237, Unknown=0, NotChecked=0, Total=2652 [2022-01-28 14:57:30,664 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 242 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:30,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 431 Invalid, 1403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:57:30,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2022-01-28 14:57:30,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 1841. [2022-01-28 14:57:30,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 3.3907608695652174) internal successors, (6239), 1840 states have internal predecessors, (6239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:30,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 6239 transitions. [2022-01-28 14:57:30,693 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 6239 transitions. Word has length 24 [2022-01-28 14:57:30,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:30,693 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 6239 transitions. [2022-01-28 14:57:30,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:30,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 6239 transitions. [2022-01-28 14:57:30,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:30,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:30,695 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:30,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:30,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:30,896 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:30,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:30,896 INFO L85 PathProgramCache]: Analyzing trace with hash -157031643, now seen corresponding path program 258 times [2022-01-28 14:57:30,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:30,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220661187] [2022-01-28 14:57:30,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:30,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:57:31,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:31,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220661187] [2022-01-28 14:57:31,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220661187] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:31,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777006153] [2022-01-28 14:57:31,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:57:31,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:31,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:31,074 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:31,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-01-28 14:57:31,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:57:31,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:31,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:57:31,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:31,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:31,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:57:31,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:31,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:31,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:31,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:57:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:57:31,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:32,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:32,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-01-28 14:57:32,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:32,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:57:32,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:32,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:57:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:57:32,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777006153] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:32,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:32,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:57:32,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368584991] [2022-01-28 14:57:32,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:32,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:57:32,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:32,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:57:32,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:57:32,119 INFO L87 Difference]: Start difference. First operand 1841 states and 6239 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:32,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:32,941 INFO L93 Difference]: Finished difference Result 2200 states and 7391 transitions. [2022-01-28 14:57:32,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:57:32,941 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:32,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:32,945 INFO L225 Difference]: With dead ends: 2200 [2022-01-28 14:57:32,945 INFO L226 Difference]: Without dead ends: 2128 [2022-01-28 14:57:32,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 14:57:32,945 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 126 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:32,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 288 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 647 Invalid, 0 Unknown, 203 Unchecked, 0.3s Time] [2022-01-28 14:57:32,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2022-01-28 14:57:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 1852. [2022-01-28 14:57:32,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 3.394921663965424) internal successors, (6284), 1851 states have internal predecessors, (6284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:32,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6284 transitions. [2022-01-28 14:57:32,968 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6284 transitions. Word has length 24 [2022-01-28 14:57:32,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:32,968 INFO L470 AbstractCegarLoop]: Abstraction has 1852 states and 6284 transitions. [2022-01-28 14:57:32,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:32,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6284 transitions. [2022-01-28 14:57:32,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:32,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:32,970 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:32,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:33,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable273 [2022-01-28 14:57:33,170 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:33,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:33,171 INFO L85 PathProgramCache]: Analyzing trace with hash 586634633, now seen corresponding path program 259 times [2022-01-28 14:57:33,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:33,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319675400] [2022-01-28 14:57:33,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:33,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:57:33,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:33,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319675400] [2022-01-28 14:57:33,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319675400] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:33,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774779253] [2022-01-28 14:57:33,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:57:33,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:33,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:33,273 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:33,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-01-28 14:57:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:33,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:57:33,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:33,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:57:33,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:57:33,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:57:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:57:33,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:34,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:34,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2022-01-28 14:57:34,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:34,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:57:34,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:34,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:57:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:57:34,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774779253] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:34,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:34,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:57:34,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828056281] [2022-01-28 14:57:34,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:34,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:57:34,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:34,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:57:34,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:57:34,303 INFO L87 Difference]: Start difference. First operand 1852 states and 6284 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:35,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:35,137 INFO L93 Difference]: Finished difference Result 3025 states and 9883 transitions. [2022-01-28 14:57:35,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:57:35,138 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:35,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:35,143 INFO L225 Difference]: With dead ends: 3025 [2022-01-28 14:57:35,143 INFO L226 Difference]: Without dead ends: 2965 [2022-01-28 14:57:35,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:57:35,144 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 202 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:35,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 386 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:57:35,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2022-01-28 14:57:35,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 1820. [2022-01-28 14:57:35,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1819 states have (on average 3.3897746014293566) internal successors, (6166), 1819 states have internal predecessors, (6166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:35,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 6166 transitions. [2022-01-28 14:57:35,176 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 6166 transitions. Word has length 24 [2022-01-28 14:57:35,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:35,176 INFO L470 AbstractCegarLoop]: Abstraction has 1820 states and 6166 transitions. [2022-01-28 14:57:35,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:35,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 6166 transitions. [2022-01-28 14:57:35,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:35,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:35,178 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:35,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-01-28 14:57:35,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:35,379 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:35,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:35,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1959470161, now seen corresponding path program 260 times [2022-01-28 14:57:35,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:35,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278666249] [2022-01-28 14:57:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:35,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:57:35,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:35,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278666249] [2022-01-28 14:57:35,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278666249] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:35,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720049184] [2022-01-28 14:57:35,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:57:35,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:35,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:35,549 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:35,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-01-28 14:57:35,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:57:35,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:35,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:57:35,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:35,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:35,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:57:35,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:35,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-01-28 14:57:35,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:57:35,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:57:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:57:35,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:36,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:36,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-01-28 14:57:36,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:36,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:57:36,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:36,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:57:36,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:57:36,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720049184] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:36,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:36,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:57:36,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171704794] [2022-01-28 14:57:36,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:36,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:57:36,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:36,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:57:36,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:57:36,576 INFO L87 Difference]: Start difference. First operand 1820 states and 6166 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:37,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:37,062 INFO L93 Difference]: Finished difference Result 2496 states and 8141 transitions. [2022-01-28 14:57:37,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 14:57:37,062 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:37,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:37,067 INFO L225 Difference]: With dead ends: 2496 [2022-01-28 14:57:37,067 INFO L226 Difference]: Without dead ends: 2462 [2022-01-28 14:57:37,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:57:37,067 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 128 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:37,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 330 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 849 Invalid, 0 Unknown, 88 Unchecked, 0.3s Time] [2022-01-28 14:57:37,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2022-01-28 14:57:37,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 1827. [2022-01-28 14:57:37,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.386089813800657) internal successors, (6183), 1826 states have internal predecessors, (6183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6183 transitions. [2022-01-28 14:57:37,107 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6183 transitions. Word has length 24 [2022-01-28 14:57:37,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:37,107 INFO L470 AbstractCegarLoop]: Abstraction has 1827 states and 6183 transitions. [2022-01-28 14:57:37,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:37,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6183 transitions. [2022-01-28 14:57:37,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:37,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:37,110 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:37,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2022-01-28 14:57:37,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:37,323 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:37,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:37,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1669178643, now seen corresponding path program 261 times [2022-01-28 14:57:37,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:37,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175304565] [2022-01-28 14:57:37,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:37,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:37,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:37,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175304565] [2022-01-28 14:57:37,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175304565] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:37,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029774500] [2022-01-28 14:57:37,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:57:37,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:37,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:37,522 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:37,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-01-28 14:57:37,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:57:37,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:37,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:57:37,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:37,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:37,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:37,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:37,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:57:37,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:37,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:57:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:37,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:38,512 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:38,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 84 [2022-01-28 14:57:38,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:38,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2022-01-28 14:57:38,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:38,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2022-01-28 14:57:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:38,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029774500] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:38,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:38,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:57:38,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021769580] [2022-01-28 14:57:38,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:38,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:57:38,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:38,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:57:38,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:57:38,822 INFO L87 Difference]: Start difference. First operand 1827 states and 6183 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:39,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:39,062 INFO L93 Difference]: Finished difference Result 1980 states and 6615 transitions. [2022-01-28 14:57:39,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:57:39,062 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:39,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:39,066 INFO L225 Difference]: With dead ends: 1980 [2022-01-28 14:57:39,066 INFO L226 Difference]: Without dead ends: 1914 [2022-01-28 14:57:39,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:57:39,066 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:39,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 184 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 514 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-01-28 14:57:39,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2022-01-28 14:57:39,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1832. [2022-01-28 14:57:39,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 3.387766247951939) internal successors, (6203), 1831 states have internal predecessors, (6203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:39,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6203 transitions. [2022-01-28 14:57:39,087 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6203 transitions. Word has length 24 [2022-01-28 14:57:39,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:39,087 INFO L470 AbstractCegarLoop]: Abstraction has 1832 states and 6203 transitions. [2022-01-28 14:57:39,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:39,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6203 transitions. [2022-01-28 14:57:39,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:39,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:39,089 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:39,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:39,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:39,290 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:39,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:39,290 INFO L85 PathProgramCache]: Analyzing trace with hash -343886093, now seen corresponding path program 262 times [2022-01-28 14:57:39,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:39,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550715549] [2022-01-28 14:57:39,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:39,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:39,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:39,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550715549] [2022-01-28 14:57:39,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550715549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:39,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138240253] [2022-01-28 14:57:39,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:57:39,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:39,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:39,513 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:39,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-01-28 14:57:39,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:57:39,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:39,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:57:39,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:39,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:39,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:39,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:39,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:57:39,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:39,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-28 14:57:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:39,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:40,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:40,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:57:40,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:40,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 60 [2022-01-28 14:57:40,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:40,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 46 [2022-01-28 14:57:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:40,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138240253] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:40,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:40,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:57:40,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783483292] [2022-01-28 14:57:40,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:40,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:57:40,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:40,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:57:40,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:57:40,665 INFO L87 Difference]: Start difference. First operand 1832 states and 6203 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:40,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:40,956 INFO L93 Difference]: Finished difference Result 1961 states and 6580 transitions. [2022-01-28 14:57:40,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:57:40,957 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:40,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:40,960 INFO L225 Difference]: With dead ends: 1961 [2022-01-28 14:57:40,960 INFO L226 Difference]: Without dead ends: 1922 [2022-01-28 14:57:40,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:57:40,960 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 54 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:40,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 256 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 558 Invalid, 0 Unknown, 203 Unchecked, 0.2s Time] [2022-01-28 14:57:40,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2022-01-28 14:57:40,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1836. [2022-01-28 14:57:40,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1835 states have (on average 3.388555858310627) internal successors, (6218), 1835 states have internal predecessors, (6218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 6218 transitions. [2022-01-28 14:57:40,981 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 6218 transitions. Word has length 24 [2022-01-28 14:57:40,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:40,981 INFO L470 AbstractCegarLoop]: Abstraction has 1836 states and 6218 transitions. [2022-01-28 14:57:40,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:40,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 6218 transitions. [2022-01-28 14:57:40,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:40,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:40,983 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:40,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-01-28 14:57:41,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-01-28 14:57:41,184 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:41,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:41,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1977729487, now seen corresponding path program 263 times [2022-01-28 14:57:41,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:41,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007122589] [2022-01-28 14:57:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:41,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:41,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:41,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007122589] [2022-01-28 14:57:41,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007122589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:41,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290608269] [2022-01-28 14:57:41,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:57:41,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:41,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:41,443 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:41,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-01-28 14:57:41,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:57:41,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:41,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:57:41,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:41,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:41,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:41,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:41,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:57:41,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:41,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:57:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:41,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:42,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:42,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 84 [2022-01-28 14:57:42,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:42,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 99 [2022-01-28 14:57:42,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:42,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 75 [2022-01-28 14:57:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:42,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290608269] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:42,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:42,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:57:42,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13410398] [2022-01-28 14:57:42,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:42,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:57:42,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:42,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:57:42,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:57:42,811 INFO L87 Difference]: Start difference. First operand 1836 states and 6218 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:43,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:43,265 INFO L93 Difference]: Finished difference Result 2008 states and 6718 transitions. [2022-01-28 14:57:43,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:57:43,266 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:43,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:43,269 INFO L225 Difference]: With dead ends: 2008 [2022-01-28 14:57:43,269 INFO L226 Difference]: Without dead ends: 1942 [2022-01-28 14:57:43,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:57:43,270 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:43,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 221 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 491 Invalid, 0 Unknown, 137 Unchecked, 0.2s Time] [2022-01-28 14:57:43,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2022-01-28 14:57:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1841. [2022-01-28 14:57:43,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 3.3896739130434783) internal successors, (6237), 1840 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:43,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 6237 transitions. [2022-01-28 14:57:43,300 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 6237 transitions. Word has length 24 [2022-01-28 14:57:43,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:43,300 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 6237 transitions. [2022-01-28 14:57:43,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:43,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 6237 transitions. [2022-01-28 14:57:43,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:43,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:43,303 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:43,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:43,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-01-28 14:57:43,503 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:43,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:43,504 INFO L85 PathProgramCache]: Analyzing trace with hash -55237457, now seen corresponding path program 264 times [2022-01-28 14:57:43,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:43,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200522774] [2022-01-28 14:57:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:43,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:43,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:43,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200522774] [2022-01-28 14:57:43,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200522774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:43,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027987729] [2022-01-28 14:57:43,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:57:43,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:43,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:43,723 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:43,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-01-28 14:57:43,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:57:43,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:43,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:57:43,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:43,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:43,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:44,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:44,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:57:44,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:44,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 14:57:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:44,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:44,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:44,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:57:44,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:44,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2022-01-28 14:57:44,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:44,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2022-01-28 14:57:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:44,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027987729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:44,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:44,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:57:44,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353866627] [2022-01-28 14:57:44,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:44,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:57:44,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:44,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:57:44,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:57:44,906 INFO L87 Difference]: Start difference. First operand 1841 states and 6237 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:45,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:45,243 INFO L93 Difference]: Finished difference Result 1978 states and 6645 transitions. [2022-01-28 14:57:45,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:57:45,243 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:45,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:45,247 INFO L225 Difference]: With dead ends: 1978 [2022-01-28 14:57:45,247 INFO L226 Difference]: Without dead ends: 1939 [2022-01-28 14:57:45,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:57:45,247 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:45,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 259 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 661 Invalid, 0 Unknown, 191 Unchecked, 0.3s Time] [2022-01-28 14:57:45,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2022-01-28 14:57:45,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1841. [2022-01-28 14:57:45,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 3.3896739130434783) internal successors, (6237), 1840 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:45,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 6237 transitions. [2022-01-28 14:57:45,269 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 6237 transitions. Word has length 24 [2022-01-28 14:57:45,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:45,269 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 6237 transitions. [2022-01-28 14:57:45,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:45,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 6237 transitions. [2022-01-28 14:57:45,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:45,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:45,272 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:45,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:45,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-01-28 14:57:45,472 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:45,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:45,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1153662861, now seen corresponding path program 265 times [2022-01-28 14:57:45,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:45,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384724255] [2022-01-28 14:57:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:45,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:45,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:45,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384724255] [2022-01-28 14:57:45,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384724255] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:45,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697341622] [2022-01-28 14:57:45,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:57:45,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:45,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:45,653 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:45,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-01-28 14:57:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:45,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:57:45,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:45,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:45,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:45,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:45,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:57:45,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:45,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-28 14:57:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:46,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:46,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:46,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:57:46,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:46,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 60 [2022-01-28 14:57:46,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:46,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 46 [2022-01-28 14:57:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:46,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697341622] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:46,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:46,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:57:46,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079364074] [2022-01-28 14:57:46,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:46,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:57:46,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:46,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:57:46,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:57:46,945 INFO L87 Difference]: Start difference. First operand 1841 states and 6237 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:47,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:47,713 INFO L93 Difference]: Finished difference Result 2081 states and 6891 transitions. [2022-01-28 14:57:47,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:57:47,713 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:47,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:47,717 INFO L225 Difference]: With dead ends: 2081 [2022-01-28 14:57:47,717 INFO L226 Difference]: Without dead ends: 1999 [2022-01-28 14:57:47,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:57:47,717 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 91 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:47,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 284 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 708 Invalid, 0 Unknown, 203 Unchecked, 0.3s Time] [2022-01-28 14:57:47,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2022-01-28 14:57:47,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1840. [2022-01-28 14:57:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 3.3887982599238717) internal successors, (6232), 1839 states have internal predecessors, (6232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 6232 transitions. [2022-01-28 14:57:47,740 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 6232 transitions. Word has length 24 [2022-01-28 14:57:47,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:47,740 INFO L470 AbstractCegarLoop]: Abstraction has 1840 states and 6232 transitions. [2022-01-28 14:57:47,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:47,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 6232 transitions. [2022-01-28 14:57:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:47,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:47,743 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:47,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-01-28 14:57:47,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2022-01-28 14:57:47,943 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:47,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:47,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1911963491, now seen corresponding path program 266 times [2022-01-28 14:57:47,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:47,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783389810] [2022-01-28 14:57:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:47,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:48,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:48,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783389810] [2022-01-28 14:57:48,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783389810] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:48,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405922731] [2022-01-28 14:57:48,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:57:48,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:48,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:48,093 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:48,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-01-28 14:57:48,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:57:48,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:48,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:57:48,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:48,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:48,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:57:48,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:48,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:57:48,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:48,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:57:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:48,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:49,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:49,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2022-01-28 14:57:49,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:49,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 64 [2022-01-28 14:57:49,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:49,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 50 [2022-01-28 14:57:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:49,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405922731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:49,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:49,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:57:49,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893775284] [2022-01-28 14:57:49,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:49,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:57:49,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:49,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:57:49,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:57:49,352 INFO L87 Difference]: Start difference. First operand 1840 states and 6232 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:51,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:51,100 INFO L93 Difference]: Finished difference Result 2520 states and 8040 transitions. [2022-01-28 14:57:51,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-28 14:57:51,100 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:51,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:51,104 INFO L225 Difference]: With dead ends: 2520 [2022-01-28 14:57:51,104 INFO L226 Difference]: Without dead ends: 2296 [2022-01-28 14:57:51,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2022-01-28 14:57:51,104 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 217 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:51,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 366 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1054 Invalid, 0 Unknown, 97 Unchecked, 0.5s Time] [2022-01-28 14:57:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2022-01-28 14:57:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1842. [2022-01-28 14:57:51,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 3.390005431830527) internal successors, (6241), 1841 states have internal predecessors, (6241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:51,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 6241 transitions. [2022-01-28 14:57:51,130 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 6241 transitions. Word has length 24 [2022-01-28 14:57:51,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:51,130 INFO L470 AbstractCegarLoop]: Abstraction has 1842 states and 6241 transitions. [2022-01-28 14:57:51,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:51,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 6241 transitions. [2022-01-28 14:57:51,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:51,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:51,133 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:51,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:51,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:51,333 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:51,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:51,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2027484205, now seen corresponding path program 267 times [2022-01-28 14:57:51,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:51,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107284317] [2022-01-28 14:57:51,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:51,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:51,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:51,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107284317] [2022-01-28 14:57:51,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107284317] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:51,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493755260] [2022-01-28 14:57:51,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:57:51,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:51,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:51,532 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:51,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-01-28 14:57:51,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 14:57:51,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:51,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:57:51,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:51,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:51,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:57:51,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:51,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:51,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:51,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:57:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:51,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:52,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:52,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2022-01-28 14:57:52,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:52,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-01-28 14:57:52,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:52,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-01-28 14:57:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:52,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493755260] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:52,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:52,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:57:52,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862945724] [2022-01-28 14:57:52,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:52,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:57:52,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:52,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:57:52,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:57:52,555 INFO L87 Difference]: Start difference. First operand 1842 states and 6241 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:53,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:53,377 INFO L93 Difference]: Finished difference Result 2087 states and 6969 transitions. [2022-01-28 14:57:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:57:53,377 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:53,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:53,381 INFO L225 Difference]: With dead ends: 2087 [2022-01-28 14:57:53,381 INFO L226 Difference]: Without dead ends: 2041 [2022-01-28 14:57:53,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 14:57:53,381 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 118 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 474 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:53,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 351 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 867 Invalid, 0 Unknown, 474 Unchecked, 0.3s Time] [2022-01-28 14:57:53,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2022-01-28 14:57:53,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1850. [2022-01-28 14:57:53,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1849 states have (on average 3.392644672796106) internal successors, (6273), 1849 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:53,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 6273 transitions. [2022-01-28 14:57:53,403 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 6273 transitions. Word has length 24 [2022-01-28 14:57:53,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:53,403 INFO L470 AbstractCegarLoop]: Abstraction has 1850 states and 6273 transitions. [2022-01-28 14:57:53,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:53,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 6273 transitions. [2022-01-28 14:57:53,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:53,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:53,406 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:53,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:53,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-01-28 14:57:53,606 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:53,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:53,606 INFO L85 PathProgramCache]: Analyzing trace with hash 718918917, now seen corresponding path program 268 times [2022-01-28 14:57:53,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:53,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315043458] [2022-01-28 14:57:53,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:53,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:53,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:53,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315043458] [2022-01-28 14:57:53,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315043458] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:53,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051765381] [2022-01-28 14:57:53,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:57:53,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:53,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:53,804 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:53,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-01-28 14:57:53,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:57:53,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:53,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:57:53,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:53,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:53,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:57:54,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:54,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:57:54,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:54,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:57:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:54,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:54,949 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:54,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 68 [2022-01-28 14:57:55,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:55,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2022-01-28 14:57:55,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:55,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2022-01-28 14:57:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:55,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051765381] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:55,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:55,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:57:55,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502522420] [2022-01-28 14:57:55,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:55,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:57:55,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:55,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:57:55,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:57:55,192 INFO L87 Difference]: Start difference. First operand 1850 states and 6273 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:55,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:55,396 INFO L93 Difference]: Finished difference Result 1991 states and 6675 transitions. [2022-01-28 14:57:55,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:57:55,396 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:55,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:55,399 INFO L225 Difference]: With dead ends: 1991 [2022-01-28 14:57:55,399 INFO L226 Difference]: Without dead ends: 1945 [2022-01-28 14:57:55,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:57:55,399 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:55,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 182 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 340 Invalid, 0 Unknown, 168 Unchecked, 0.2s Time] [2022-01-28 14:57:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2022-01-28 14:57:55,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1876. [2022-01-28 14:57:55,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 3.3829333333333333) internal successors, (6343), 1875 states have internal predecessors, (6343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 6343 transitions. [2022-01-28 14:57:55,419 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 6343 transitions. Word has length 24 [2022-01-28 14:57:55,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:55,419 INFO L470 AbstractCegarLoop]: Abstraction has 1876 states and 6343 transitions. [2022-01-28 14:57:55,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:55,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 6343 transitions. [2022-01-28 14:57:55,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:55,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:55,422 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:55,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:55,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:55,622 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:55,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:55,622 INFO L85 PathProgramCache]: Analyzing trace with hash 43536989, now seen corresponding path program 269 times [2022-01-28 14:57:55,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:55,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043519425] [2022-01-28 14:57:55,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:55,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:55,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:55,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043519425] [2022-01-28 14:57:55,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043519425] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:55,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409376033] [2022-01-28 14:57:55,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:57:55,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:55,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:55,828 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:55,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-01-28 14:57:55,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 14:57:55,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:55,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:57:55,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:55,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:55,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:57:56,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:56,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:56,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:56,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:57:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:56,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:56,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:56,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 66 [2022-01-28 14:57:56,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:56,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2022-01-28 14:57:56,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:56,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2022-01-28 14:57:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:56,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409376033] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:56,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:56,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:57:56,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544104248] [2022-01-28 14:57:56,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:56,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:57:56,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:56,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:57:56,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:57:56,977 INFO L87 Difference]: Start difference. First operand 1876 states and 6343 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:57,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:57,347 INFO L93 Difference]: Finished difference Result 2009 states and 6692 transitions. [2022-01-28 14:57:57,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:57:57,347 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:57,351 INFO L225 Difference]: With dead ends: 2009 [2022-01-28 14:57:57,351 INFO L226 Difference]: Without dead ends: 1958 [2022-01-28 14:57:57,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:57:57,351 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 78 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:57,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 233 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 463 Invalid, 0 Unknown, 344 Unchecked, 0.2s Time] [2022-01-28 14:57:57,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2022-01-28 14:57:57,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1850. [2022-01-28 14:57:57,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1849 states have (on average 3.392103839913467) internal successors, (6272), 1849 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 6272 transitions. [2022-01-28 14:57:57,372 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 6272 transitions. Word has length 24 [2022-01-28 14:57:57,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:57,372 INFO L470 AbstractCegarLoop]: Abstraction has 1850 states and 6272 transitions. [2022-01-28 14:57:57,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:57,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 6272 transitions. [2022-01-28 14:57:57,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:57,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:57,375 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:57,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-01-28 14:57:57,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:57,575 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:57,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:57,576 INFO L85 PathProgramCache]: Analyzing trace with hash 234516147, now seen corresponding path program 270 times [2022-01-28 14:57:57,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:57,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337402854] [2022-01-28 14:57:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:57,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:57,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:57,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337402854] [2022-01-28 14:57:57,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337402854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:57,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035136859] [2022-01-28 14:57:57,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:57:57,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:57,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:57,767 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:57:57,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-01-28 14:57:57,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:57:57,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:57,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:57:57,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:57,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:57,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:57:58,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:58,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-01-28 14:57:58,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:58,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 14:57:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:58,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:58,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:58,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 68 [2022-01-28 14:57:58,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:58,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2022-01-28 14:57:58,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:58,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2022-01-28 14:57:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:57:59,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035136859] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:59,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:59,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:57:59,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207690951] [2022-01-28 14:57:59,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:59,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:57:59,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:59,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:57:59,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:57:59,051 INFO L87 Difference]: Start difference. First operand 1850 states and 6272 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:59,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:59,697 INFO L93 Difference]: Finished difference Result 2132 states and 6957 transitions. [2022-01-28 14:57:59,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:57:59,698 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:57:59,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:59,701 INFO L225 Difference]: With dead ends: 2132 [2022-01-28 14:57:59,701 INFO L226 Difference]: Without dead ends: 2003 [2022-01-28 14:57:59,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:57:59,701 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 108 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:59,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 350 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 769 Invalid, 0 Unknown, 218 Unchecked, 0.3s Time] [2022-01-28 14:57:59,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-01-28 14:57:59,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1852. [2022-01-28 14:57:59,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 3.391139924365208) internal successors, (6277), 1851 states have internal predecessors, (6277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:59,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6277 transitions. [2022-01-28 14:57:59,724 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6277 transitions. Word has length 24 [2022-01-28 14:57:59,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:59,724 INFO L470 AbstractCegarLoop]: Abstraction has 1852 states and 6277 transitions. [2022-01-28 14:57:59,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:59,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6277 transitions. [2022-01-28 14:57:59,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:57:59,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:59,727 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:59,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2022-01-28 14:57:59,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:59,928 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:59,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:59,928 INFO L85 PathProgramCache]: Analyzing trace with hash 923526333, now seen corresponding path program 271 times [2022-01-28 14:57:59,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:59,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924073498] [2022-01-28 14:57:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:59,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:00,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:00,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924073498] [2022-01-28 14:58:00,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924073498] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:00,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364330923] [2022-01-28 14:58:00,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:58:00,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:00,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:00,120 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:00,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-01-28 14:58:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:00,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:58:00,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:00,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:58:00,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:00,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:58:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:00,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:00,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:00,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:58:01,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:01,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2022-01-28 14:58:01,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:01,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2022-01-28 14:58:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:01,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364330923] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:01,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:01,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:58:01,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614842137] [2022-01-28 14:58:01,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:01,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:58:01,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:01,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:58:01,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:58:01,132 INFO L87 Difference]: Start difference. First operand 1852 states and 6277 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:01,806 INFO L93 Difference]: Finished difference Result 2075 states and 6837 transitions. [2022-01-28 14:58:01,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:58:01,806 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:01,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:01,810 INFO L225 Difference]: With dead ends: 2075 [2022-01-28 14:58:01,810 INFO L226 Difference]: Without dead ends: 2013 [2022-01-28 14:58:01,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:58:01,810 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 86 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:01,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 283 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:01,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2022-01-28 14:58:01,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1858. [2022-01-28 14:58:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 3.388260635433495) internal successors, (6292), 1857 states have internal predecessors, (6292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 6292 transitions. [2022-01-28 14:58:01,834 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 6292 transitions. Word has length 24 [2022-01-28 14:58:01,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:01,834 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 6292 transitions. [2022-01-28 14:58:01,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:01,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 6292 transitions. [2022-01-28 14:58:01,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:01,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:01,836 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:01,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:02,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:02,037 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:02,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:02,037 INFO L85 PathProgramCache]: Analyzing trace with hash -784522235, now seen corresponding path program 272 times [2022-01-28 14:58:02,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:02,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39156960] [2022-01-28 14:58:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:02,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:02,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:02,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39156960] [2022-01-28 14:58:02,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39156960] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:02,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755509264] [2022-01-28 14:58:02,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:58:02,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:02,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:02,210 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:02,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-01-28 14:58:02,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:58:02,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:02,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:58:02,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:02,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:58:02,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:58:02,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 14:58:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:02,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:02,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:02,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 84 [2022-01-28 14:58:03,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:03,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2022-01-28 14:58:03,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:03,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2022-01-28 14:58:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:03,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755509264] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:03,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:03,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:58:03,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291621565] [2022-01-28 14:58:03,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:03,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:58:03,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:03,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:58:03,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:58:03,166 INFO L87 Difference]: Start difference. First operand 1858 states and 6292 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:04,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:04,142 INFO L93 Difference]: Finished difference Result 2106 states and 6993 transitions. [2022-01-28 14:58:04,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:58:04,142 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:04,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:04,146 INFO L225 Difference]: With dead ends: 2106 [2022-01-28 14:58:04,146 INFO L226 Difference]: Without dead ends: 2024 [2022-01-28 14:58:04,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:58:04,146 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 76 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:04,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 370 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:04,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2022-01-28 14:58:04,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1864. [2022-01-28 14:58:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 3.3870101986044014) internal successors, (6310), 1863 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:04,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 6310 transitions. [2022-01-28 14:58:04,168 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 6310 transitions. Word has length 24 [2022-01-28 14:58:04,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:04,168 INFO L470 AbstractCegarLoop]: Abstraction has 1864 states and 6310 transitions. [2022-01-28 14:58:04,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 6310 transitions. [2022-01-28 14:58:04,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:04,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:04,171 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:04,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:04,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-01-28 14:58:04,371 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:04,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:04,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1882947639, now seen corresponding path program 273 times [2022-01-28 14:58:04,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:04,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538403815] [2022-01-28 14:58:04,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:04,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:04,551 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:04,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:04,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538403815] [2022-01-28 14:58:04,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538403815] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:04,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511357253] [2022-01-28 14:58:04,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:58:04,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:04,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:04,553 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:04,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-01-28 14:58:04,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:58:04,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:04,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:58:04,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:04,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:04,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:58:04,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:04,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:58:04,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:04,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:58:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:04,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:05,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:05,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 84 [2022-01-28 14:58:05,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:05,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2022-01-28 14:58:05,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:05,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2022-01-28 14:58:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:05,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511357253] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:05,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:05,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:58:05,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793386727] [2022-01-28 14:58:05,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:05,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:58:05,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:05,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:58:05,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:58:05,612 INFO L87 Difference]: Start difference. First operand 1864 states and 6310 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:06,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:06,011 INFO L93 Difference]: Finished difference Result 2079 states and 6867 transitions. [2022-01-28 14:58:06,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:58:06,011 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:06,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:06,014 INFO L225 Difference]: With dead ends: 2079 [2022-01-28 14:58:06,014 INFO L226 Difference]: Without dead ends: 1997 [2022-01-28 14:58:06,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:58:06,015 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 64 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:06,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 246 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 394 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-01-28 14:58:06,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2022-01-28 14:58:06,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1868. [2022-01-28 14:58:06,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 3.385109801821103) internal successors, (6320), 1867 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:06,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 6320 transitions. [2022-01-28 14:58:06,037 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 6320 transitions. Word has length 24 [2022-01-28 14:58:06,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:06,037 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 6320 transitions. [2022-01-28 14:58:06,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:06,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 6320 transitions. [2022-01-28 14:58:06,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:06,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:06,039 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:06,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:06,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-01-28 14:58:06,240 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:06,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:06,240 INFO L85 PathProgramCache]: Analyzing trace with hash -900042949, now seen corresponding path program 274 times [2022-01-28 14:58:06,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:06,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816107350] [2022-01-28 14:58:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:06,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:06,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:06,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816107350] [2022-01-28 14:58:06,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816107350] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:06,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540925192] [2022-01-28 14:58:06,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:58:06,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:06,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:06,455 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:06,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-01-28 14:58:06,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:58:06,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:06,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:58:06,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:06,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:06,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-28 14:58:06,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:06,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:58:06,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:06,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:58:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:06,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:07,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:07,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 51 [2022-01-28 14:58:07,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:07,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-01-28 14:58:07,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:07,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 54 [2022-01-28 14:58:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:07,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540925192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:07,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:07,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:58:07,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460723832] [2022-01-28 14:58:07,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:07,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:58:07,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:07,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:58:07,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:58:07,508 INFO L87 Difference]: Start difference. First operand 1868 states and 6320 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:08,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:08,108 INFO L93 Difference]: Finished difference Result 2200 states and 7149 transitions. [2022-01-28 14:58:08,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:58:08,108 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:08,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:08,112 INFO L225 Difference]: With dead ends: 2200 [2022-01-28 14:58:08,112 INFO L226 Difference]: Without dead ends: 2071 [2022-01-28 14:58:08,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:58:08,113 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 103 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:08,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 315 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 791 Invalid, 0 Unknown, 31 Unchecked, 0.3s Time] [2022-01-28 14:58:08,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2022-01-28 14:58:08,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1870. [2022-01-28 14:58:08,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 3.3841626538255754) internal successors, (6325), 1869 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:08,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 6325 transitions. [2022-01-28 14:58:08,136 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 6325 transitions. Word has length 24 [2022-01-28 14:58:08,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:08,136 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 6325 transitions. [2022-01-28 14:58:08,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:08,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 6325 transitions. [2022-01-28 14:58:08,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:08,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:08,138 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:08,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:08,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-01-28 14:58:08,338 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:08,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:08,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1655808971, now seen corresponding path program 275 times [2022-01-28 14:58:08,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:08,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326303371] [2022-01-28 14:58:08,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:08,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:08,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:08,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326303371] [2022-01-28 14:58:08,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326303371] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:08,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053068785] [2022-01-28 14:58:08,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:58:08,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:08,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:08,584 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:08,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-01-28 14:58:08,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 14:58:08,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:08,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:58:08,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:08,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:08,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:58:08,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:08,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:58:08,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:08,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:58:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:08,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:09,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:09,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-01-28 14:58:09,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:09,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-01-28 14:58:09,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:09,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-01-28 14:58:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:09,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053068785] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:09,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:09,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:58:09,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016713254] [2022-01-28 14:58:09,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:09,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:58:09,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:58:09,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:58:09,623 INFO L87 Difference]: Start difference. First operand 1870 states and 6325 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:10,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:10,454 INFO L93 Difference]: Finished difference Result 2098 states and 6936 transitions. [2022-01-28 14:58:10,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:58:10,454 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:10,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:10,457 INFO L225 Difference]: With dead ends: 2098 [2022-01-28 14:58:10,458 INFO L226 Difference]: Without dead ends: 1978 [2022-01-28 14:58:10,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:58:10,458 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 101 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:10,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 258 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 768 Invalid, 0 Unknown, 129 Unchecked, 0.3s Time] [2022-01-28 14:58:10,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2022-01-28 14:58:10,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1872. [2022-01-28 14:58:10,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1871 states have (on average 3.3848209513629075) internal successors, (6333), 1871 states have internal predecessors, (6333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 6333 transitions. [2022-01-28 14:58:10,487 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 6333 transitions. Word has length 24 [2022-01-28 14:58:10,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:10,487 INFO L470 AbstractCegarLoop]: Abstraction has 1872 states and 6333 transitions. [2022-01-28 14:58:10,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:10,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 6333 transitions. [2022-01-28 14:58:10,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:10,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:10,489 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:10,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:10,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2022-01-28 14:58:10,690 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:10,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:10,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1540288257, now seen corresponding path program 276 times [2022-01-28 14:58:10,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:10,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971245137] [2022-01-28 14:58:10,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:10,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:10,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:10,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971245137] [2022-01-28 14:58:10,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971245137] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:10,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791621347] [2022-01-28 14:58:10,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:58:10,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:10,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:10,946 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:10,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-01-28 14:58:10,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:58:10,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:10,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:58:10,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:11,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:11,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:58:11,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:11,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:11,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:11,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:58:11,420 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:11,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:12,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:12,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-01-28 14:58:12,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:12,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 64 [2022-01-28 14:58:12,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:12,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 50 [2022-01-28 14:58:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:12,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791621347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:12,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:12,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:58:12,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114712774] [2022-01-28 14:58:12,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:12,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:58:12,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:12,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:58:12,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:58:12,193 INFO L87 Difference]: Start difference. First operand 1872 states and 6333 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:15,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:15,672 INFO L93 Difference]: Finished difference Result 2697 states and 8503 transitions. [2022-01-28 14:58:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-28 14:58:15,673 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:15,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:15,677 INFO L225 Difference]: With dead ends: 2697 [2022-01-28 14:58:15,677 INFO L226 Difference]: Without dead ends: 2448 [2022-01-28 14:58:15,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=481, Invalid=2171, Unknown=0, NotChecked=0, Total=2652 [2022-01-28 14:58:15,677 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 406 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:15,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 304 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 771 Invalid, 0 Unknown, 394 Unchecked, 0.4s Time] [2022-01-28 14:58:15,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2022-01-28 14:58:15,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 1876. [2022-01-28 14:58:15,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 3.3861333333333334) internal successors, (6349), 1875 states have internal predecessors, (6349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:15,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 6349 transitions. [2022-01-28 14:58:15,703 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 6349 transitions. Word has length 24 [2022-01-28 14:58:15,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:15,703 INFO L470 AbstractCegarLoop]: Abstraction has 1876 states and 6349 transitions. [2022-01-28 14:58:15,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:15,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 6349 transitions. [2022-01-28 14:58:15,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:15,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:15,711 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:15,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Ended with exit code 0 [2022-01-28 14:58:15,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:15,912 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:15,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:15,912 INFO L85 PathProgramCache]: Analyzing trace with hash -2088920949, now seen corresponding path program 277 times [2022-01-28 14:58:15,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:15,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108494629] [2022-01-28 14:58:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:15,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:58:16,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:16,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108494629] [2022-01-28 14:58:16,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108494629] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:16,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118252567] [2022-01-28 14:58:16,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:58:16,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:16,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:16,040 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:16,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-01-28 14:58:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:16,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:58:16,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:16,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:58:16,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:16,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:58:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:58:16,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:17,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:17,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-01-28 14:58:17,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:17,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 60 [2022-01-28 14:58:17,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:17,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 46 [2022-01-28 14:58:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:58:17,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118252567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:17,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:17,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:58:17,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742635741] [2022-01-28 14:58:17,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:17,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:58:17,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:17,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:58:17,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:58:17,284 INFO L87 Difference]: Start difference. First operand 1876 states and 6349 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:20,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:20,892 INFO L93 Difference]: Finished difference Result 3857 states and 11739 transitions. [2022-01-28 14:58:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-28 14:58:20,893 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:20,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:20,898 INFO L225 Difference]: With dead ends: 3857 [2022-01-28 14:58:20,899 INFO L226 Difference]: Without dead ends: 3581 [2022-01-28 14:58:20,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=560, Invalid=2632, Unknown=0, NotChecked=0, Total=3192 [2022-01-28 14:58:20,899 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 337 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:20,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 423 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:58:20,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3581 states. [2022-01-28 14:58:20,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3581 to 1956. [2022-01-28 14:58:20,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 3.395907928388747) internal successors, (6639), 1955 states have internal predecessors, (6639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 6639 transitions. [2022-01-28 14:58:20,942 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 6639 transitions. Word has length 24 [2022-01-28 14:58:20,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:20,942 INFO L470 AbstractCegarLoop]: Abstraction has 1956 states and 6639 transitions. [2022-01-28 14:58:20,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:20,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 6639 transitions. [2022-01-28 14:58:20,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:20,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:20,945 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:20,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:21,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2022-01-28 14:58:21,145 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:21,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:21,145 INFO L85 PathProgramCache]: Analyzing trace with hash -492678687, now seen corresponding path program 278 times [2022-01-28 14:58:21,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:21,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336782393] [2022-01-28 14:58:21,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:21,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:21,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:21,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336782393] [2022-01-28 14:58:21,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336782393] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:21,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503210096] [2022-01-28 14:58:21,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:58:21,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:21,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:21,317 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:21,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-01-28 14:58:21,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:58:21,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:21,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:58:21,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:21,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:58:21,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:58:21,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:58:21,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:58:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:21,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:22,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:22,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 47 [2022-01-28 14:58:22,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:22,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2022-01-28 14:58:22,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:22,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2022-01-28 14:58:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:22,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503210096] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:22,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:22,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:58:22,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142442716] [2022-01-28 14:58:22,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:22,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:58:22,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:22,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:58:22,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:58:22,280 INFO L87 Difference]: Start difference. First operand 1956 states and 6639 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:24,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:24,402 INFO L93 Difference]: Finished difference Result 3147 states and 10024 transitions. [2022-01-28 14:58:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-28 14:58:24,402 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:24,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:24,407 INFO L225 Difference]: With dead ends: 3147 [2022-01-28 14:58:24,407 INFO L226 Difference]: Without dead ends: 2959 [2022-01-28 14:58:24,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=351, Invalid=1811, Unknown=0, NotChecked=0, Total=2162 [2022-01-28 14:58:24,407 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 219 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:24,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 414 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1285 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:58:24,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2959 states. [2022-01-28 14:58:24,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2959 to 1959. [2022-01-28 14:58:24,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1958 states have (on average 3.3968335035750767) internal successors, (6651), 1958 states have internal predecessors, (6651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:24,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 6651 transitions. [2022-01-28 14:58:24,445 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 6651 transitions. Word has length 24 [2022-01-28 14:58:24,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:24,446 INFO L470 AbstractCegarLoop]: Abstraction has 1959 states and 6651 transitions. [2022-01-28 14:58:24,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:24,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 6651 transitions. [2022-01-28 14:58:24,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:24,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:24,448 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:24,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-01-28 14:58:24,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2022-01-28 14:58:24,648 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:24,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:24,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1378283027, now seen corresponding path program 279 times [2022-01-28 14:58:24,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:24,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035644730] [2022-01-28 14:58:24,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:24,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:24,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:24,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035644730] [2022-01-28 14:58:24,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035644730] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:24,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789753254] [2022-01-28 14:58:24,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:58:24,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:24,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:24,843 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:24,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-01-28 14:58:24,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 14:58:24,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:24,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:58:24,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:24,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:24,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:58:25,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:25,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:25,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:25,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:58:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:25,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:25,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:25,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2022-01-28 14:58:25,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:25,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2022-01-28 14:58:25,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:25,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-01-28 14:58:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:25,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789753254] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:25,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:25,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:58:25,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346078043] [2022-01-28 14:58:25,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:25,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:58:25,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:25,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:58:25,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:58:25,824 INFO L87 Difference]: Start difference. First operand 1959 states and 6651 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:27,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:27,364 INFO L93 Difference]: Finished difference Result 2883 states and 9337 transitions. [2022-01-28 14:58:27,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-28 14:58:27,364 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:27,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:27,369 INFO L225 Difference]: With dead ends: 2883 [2022-01-28 14:58:27,369 INFO L226 Difference]: Without dead ends: 2663 [2022-01-28 14:58:27,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=283, Invalid=1973, Unknown=0, NotChecked=0, Total=2256 [2022-01-28 14:58:27,370 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 186 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:27,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 374 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 749 Invalid, 0 Unknown, 312 Unchecked, 0.4s Time] [2022-01-28 14:58:27,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2022-01-28 14:58:27,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 1980. [2022-01-28 14:58:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.4047498736735724) internal successors, (6738), 1979 states have internal predecessors, (6738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6738 transitions. [2022-01-28 14:58:27,413 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6738 transitions. Word has length 24 [2022-01-28 14:58:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:27,413 INFO L470 AbstractCegarLoop]: Abstraction has 1980 states and 6738 transitions. [2022-01-28 14:58:27,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:27,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6738 transitions. [2022-01-28 14:58:27,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:27,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:27,416 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:27,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:27,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:27,616 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:27,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:27,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1349637043, now seen corresponding path program 280 times [2022-01-28 14:58:27,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:27,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443628968] [2022-01-28 14:58:27,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:27,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:58:27,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:27,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443628968] [2022-01-28 14:58:27,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443628968] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:27,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86352178] [2022-01-28 14:58:27,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:58:27,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:27,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:27,723 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:27,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-01-28 14:58:27,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:58:27,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:27,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:58:27,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:27,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:58:27,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:58:27,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 14:58:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:58:28,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:28,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:28,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 47 [2022-01-28 14:58:28,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:28,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-01-28 14:58:28,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:28,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 54 [2022-01-28 14:58:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:58:28,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86352178] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:28,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:28,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:58:28,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599767187] [2022-01-28 14:58:28,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:28,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:58:28,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:28,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:58:28,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:58:28,712 INFO L87 Difference]: Start difference. First operand 1980 states and 6738 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:29,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:29,604 INFO L93 Difference]: Finished difference Result 2913 states and 9577 transitions. [2022-01-28 14:58:29,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:58:29,604 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:29,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:29,609 INFO L225 Difference]: With dead ends: 2913 [2022-01-28 14:58:29,609 INFO L226 Difference]: Without dead ends: 2752 [2022-01-28 14:58:29,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:58:29,610 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 194 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:29,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 265 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:29,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2022-01-28 14:58:29,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 1971. [2022-01-28 14:58:29,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1970 states have (on average 3.4086294416243654) internal successors, (6715), 1970 states have internal predecessors, (6715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:29,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 6715 transitions. [2022-01-28 14:58:29,639 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 6715 transitions. Word has length 24 [2022-01-28 14:58:29,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:29,639 INFO L470 AbstractCegarLoop]: Abstraction has 1971 states and 6715 transitions. [2022-01-28 14:58:29,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:29,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 6715 transitions. [2022-01-28 14:58:29,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:29,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:29,642 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:29,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:29,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:29,842 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:29,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:29,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1572494725, now seen corresponding path program 281 times [2022-01-28 14:58:29,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:29,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891360111] [2022-01-28 14:58:29,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:29,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:30,025 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:58:30,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:30,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891360111] [2022-01-28 14:58:30,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891360111] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:30,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305327486] [2022-01-28 14:58:30,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:58:30,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:30,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:30,027 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:30,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-01-28 14:58:30,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:58:30,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:30,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:58:30,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:30,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:30,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:58:30,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:30,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:58:30,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:58:30,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 14:58:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:58:30,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:30,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:30,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 71 [2022-01-28 14:58:30,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:30,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 96 [2022-01-28 14:58:30,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:30,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 72 [2022-01-28 14:58:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:58:31,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305327486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:31,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:31,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:58:31,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766296829] [2022-01-28 14:58:31,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:31,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:58:31,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:31,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:58:31,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:58:31,039 INFO L87 Difference]: Start difference. First operand 1971 states and 6715 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:31,409 INFO L93 Difference]: Finished difference Result 2211 states and 7365 transitions. [2022-01-28 14:58:31,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:58:31,409 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:31,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:31,413 INFO L225 Difference]: With dead ends: 2211 [2022-01-28 14:58:31,413 INFO L226 Difference]: Without dead ends: 2173 [2022-01-28 14:58:31,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:58:31,413 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 59 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:31,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 300 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 901 Invalid, 0 Unknown, 12 Unchecked, 0.4s Time] [2022-01-28 14:58:31,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2173 states. [2022-01-28 14:58:31,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2173 to 1973. [2022-01-28 14:58:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 3.4077079107505073) internal successors, (6720), 1972 states have internal predecessors, (6720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:31,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 6720 transitions. [2022-01-28 14:58:31,437 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 6720 transitions. Word has length 24 [2022-01-28 14:58:31,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:31,437 INFO L470 AbstractCegarLoop]: Abstraction has 1973 states and 6720 transitions. [2022-01-28 14:58:31,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:31,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 6720 transitions. [2022-01-28 14:58:31,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:31,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:31,439 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:31,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:31,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:31,640 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:31,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:31,640 INFO L85 PathProgramCache]: Analyzing trace with hash 873231215, now seen corresponding path program 282 times [2022-01-28 14:58:31,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:31,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5297483] [2022-01-28 14:58:31,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:31,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:31,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:31,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5297483] [2022-01-28 14:58:31,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5297483] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:31,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834957250] [2022-01-28 14:58:31,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:58:31,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:31,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:31,823 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:31,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-01-28 14:58:31,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:58:31,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:31,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:58:31,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:31,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:31,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:31,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:58:31,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:31,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:58:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:32,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:32,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:32,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 84 [2022-01-28 14:58:32,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:32,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2022-01-28 14:58:32,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:32,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2022-01-28 14:58:32,722 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:32,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834957250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:32,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:32,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:58:32,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446761437] [2022-01-28 14:58:32,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:32,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:58:32,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:32,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:58:32,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:58:32,722 INFO L87 Difference]: Start difference. First operand 1973 states and 6720 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:34,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:34,051 INFO L93 Difference]: Finished difference Result 2433 states and 7916 transitions. [2022-01-28 14:58:34,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 14:58:34,051 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:34,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:34,055 INFO L225 Difference]: With dead ends: 2433 [2022-01-28 14:58:34,056 INFO L226 Difference]: Without dead ends: 2304 [2022-01-28 14:58:34,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=307, Invalid=1673, Unknown=0, NotChecked=0, Total=1980 [2022-01-28 14:58:34,056 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 133 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:34,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 380 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:58:34,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2022-01-28 14:58:34,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 1974. [2022-01-28 14:58:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.409528636594019) internal successors, (6727), 1973 states have internal predecessors, (6727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:34,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 6727 transitions. [2022-01-28 14:58:34,083 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 6727 transitions. Word has length 24 [2022-01-28 14:58:34,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:34,083 INFO L470 AbstractCegarLoop]: Abstraction has 1974 states and 6727 transitions. [2022-01-28 14:58:34,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:34,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 6727 transitions. [2022-01-28 14:58:34,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:34,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:34,086 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:34,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2022-01-28 14:58:34,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable297 [2022-01-28 14:58:34,286 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:34,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:34,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1856135905, now seen corresponding path program 283 times [2022-01-28 14:58:34,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:34,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286799995] [2022-01-28 14:58:34,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:34,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:34,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:34,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286799995] [2022-01-28 14:58:34,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286799995] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:34,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069040106] [2022-01-28 14:58:34,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:58:34,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:34,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:34,454 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:34,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-01-28 14:58:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:34,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:58:34,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:34,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-01-28 14:58:34,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-01-28 14:58:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:34,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:35,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:35,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 51 [2022-01-28 14:58:35,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:35,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2022-01-28 14:58:35,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:35,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2022-01-28 14:58:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:35,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069040106] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:35,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:35,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:58:35,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910861217] [2022-01-28 14:58:35,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:35,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:58:35,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:35,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:58:35,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:58:35,369 INFO L87 Difference]: Start difference. First operand 1974 states and 6727 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:36,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:36,274 INFO L93 Difference]: Finished difference Result 2439 states and 7953 transitions. [2022-01-28 14:58:36,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:58:36,275 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:36,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:36,278 INFO L225 Difference]: With dead ends: 2439 [2022-01-28 14:58:36,278 INFO L226 Difference]: Without dead ends: 2310 [2022-01-28 14:58:36,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 14:58:36,279 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 171 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:36,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 303 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:36,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2022-01-28 14:58:36,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1981. [2022-01-28 14:58:36,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 3.407070707070707) internal successors, (6746), 1980 states have internal predecessors, (6746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:36,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 6746 transitions. [2022-01-28 14:58:36,305 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 6746 transitions. Word has length 24 [2022-01-28 14:58:36,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:36,305 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 6746 transitions. [2022-01-28 14:58:36,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:36,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 6746 transitions. [2022-01-28 14:58:36,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:36,307 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:36,307 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:36,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2022-01-28 14:58:36,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-01-28 14:58:36,508 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:36,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:36,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1216007631, now seen corresponding path program 284 times [2022-01-28 14:58:36,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:36,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111045515] [2022-01-28 14:58:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:36,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:36,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:36,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111045515] [2022-01-28 14:58:36,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111045515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:36,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309260405] [2022-01-28 14:58:36,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:58:36,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:36,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:36,665 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:36,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-01-28 14:58:36,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:58:36,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:36,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:58:36,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:36,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:58:36,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:58:36,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:58:36,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:58:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:36,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:37,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:37,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2022-01-28 14:58:37,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:37,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:58:37,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:37,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:58:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:37,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309260405] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:37,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:37,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:58:37,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729899795] [2022-01-28 14:58:37,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:37,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:58:37,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:37,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:58:37,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:58:37,621 INFO L87 Difference]: Start difference. First operand 1981 states and 6746 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:38,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:38,154 INFO L93 Difference]: Finished difference Result 2489 states and 8298 transitions. [2022-01-28 14:58:38,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:58:38,155 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:38,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:38,159 INFO L225 Difference]: With dead ends: 2489 [2022-01-28 14:58:38,159 INFO L226 Difference]: Without dead ends: 2423 [2022-01-28 14:58:38,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:58:38,160 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 96 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:38,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 338 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:38,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2022-01-28 14:58:38,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 1982. [2022-01-28 14:58:38,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 3.407370015143867) internal successors, (6750), 1981 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 6750 transitions. [2022-01-28 14:58:38,188 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 6750 transitions. Word has length 24 [2022-01-28 14:58:38,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:38,188 INFO L470 AbstractCegarLoop]: Abstraction has 1982 states and 6750 transitions. [2022-01-28 14:58:38,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:38,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 6750 transitions. [2022-01-28 14:58:38,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:38,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:38,191 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:38,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-01-28 14:58:38,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2022-01-28 14:58:38,391 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:38,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:38,391 INFO L85 PathProgramCache]: Analyzing trace with hash 141394073, now seen corresponding path program 285 times [2022-01-28 14:58:38,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:38,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434706657] [2022-01-28 14:58:38,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:38,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:38,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:38,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434706657] [2022-01-28 14:58:38,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434706657] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:38,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849473926] [2022-01-28 14:58:38,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:58:38,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:38,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:38,560 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:38,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-01-28 14:58:38,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:58:38,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:38,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:58:38,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:38,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:38,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:58:38,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:38,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:38,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:38,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:58:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:38,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:39,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:39,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:58:39,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:39,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:58:39,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:39,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:58:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:39,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849473926] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:39,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:39,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:58:39,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371519261] [2022-01-28 14:58:39,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:39,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:58:39,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:39,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:58:39,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:58:39,846 INFO L87 Difference]: Start difference. First operand 1982 states and 6750 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:40,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:40,067 INFO L93 Difference]: Finished difference Result 2118 states and 7160 transitions. [2022-01-28 14:58:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:58:40,067 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:40,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:40,071 INFO L225 Difference]: With dead ends: 2118 [2022-01-28 14:58:40,071 INFO L226 Difference]: Without dead ends: 2087 [2022-01-28 14:58:40,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:58:40,071 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 66 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:40,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 161 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 446 Invalid, 0 Unknown, 245 Unchecked, 0.2s Time] [2022-01-28 14:58:40,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2022-01-28 14:58:40,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 1982. [2022-01-28 14:58:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 3.407370015143867) internal successors, (6750), 1981 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 6750 transitions. [2022-01-28 14:58:40,095 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 6750 transitions. Word has length 24 [2022-01-28 14:58:40,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:40,095 INFO L470 AbstractCegarLoop]: Abstraction has 1982 states and 6750 transitions. [2022-01-28 14:58:40,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:40,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 6750 transitions. [2022-01-28 14:58:40,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:40,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:40,097 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:40,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:40,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-01-28 14:58:40,298 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:40,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:40,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1499680715, now seen corresponding path program 286 times [2022-01-28 14:58:40,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:40,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628111629] [2022-01-28 14:58:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:40,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:40,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:40,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628111629] [2022-01-28 14:58:40,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628111629] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:40,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479807000] [2022-01-28 14:58:40,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:58:40,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:40,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:40,490 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:40,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-01-28 14:58:40,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:58:40,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:40,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:58:40,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:40,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:40,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:58:40,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:40,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:58:40,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:40,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:58:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:40,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:41,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:41,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 105 [2022-01-28 14:58:41,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:41,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:58:41,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:41,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:58:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:41,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479807000] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:41,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:41,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:58:41,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570886322] [2022-01-28 14:58:41,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:41,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:58:41,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:41,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:58:41,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:58:41,564 INFO L87 Difference]: Start difference. First operand 1982 states and 6750 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:42,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:42,486 INFO L93 Difference]: Finished difference Result 2253 states and 7458 transitions. [2022-01-28 14:58:42,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:58:42,487 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:42,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:42,490 INFO L225 Difference]: With dead ends: 2253 [2022-01-28 14:58:42,490 INFO L226 Difference]: Without dead ends: 2152 [2022-01-28 14:58:42,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:58:42,491 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 127 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:42,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 184 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 595 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2022-01-28 14:58:42,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2022-01-28 14:58:42,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 1982. [2022-01-28 14:58:42,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 3.407370015143867) internal successors, (6750), 1981 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 6750 transitions. [2022-01-28 14:58:42,515 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 6750 transitions. Word has length 24 [2022-01-28 14:58:42,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:42,515 INFO L470 AbstractCegarLoop]: Abstraction has 1982 states and 6750 transitions. [2022-01-28 14:58:42,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:42,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 6750 transitions. [2022-01-28 14:58:42,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:42,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:42,518 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:42,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-01-28 14:58:42,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-01-28 14:58:42,718 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:42,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:42,718 INFO L85 PathProgramCache]: Analyzing trace with hash -371056949, now seen corresponding path program 287 times [2022-01-28 14:58:42,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:42,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750576365] [2022-01-28 14:58:42,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:42,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:58:42,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:42,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750576365] [2022-01-28 14:58:42,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750576365] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:42,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070303762] [2022-01-28 14:58:42,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:58:42,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:42,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:42,922 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:42,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-01-28 14:58:42,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 14:58:42,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:42,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:58:42,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:43,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:43,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:58:43,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:43,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:58:43,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:43,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-01-28 14:58:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:58:43,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:43,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:43,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-01-28 14:58:44,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:44,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:58:44,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:44,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:58:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:58:44,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070303762] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:44,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:44,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:58:44,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816605532] [2022-01-28 14:58:44,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:44,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:58:44,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:44,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:58:44,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:58:44,073 INFO L87 Difference]: Start difference. First operand 1982 states and 6750 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:44,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:44,323 INFO L93 Difference]: Finished difference Result 2139 states and 7179 transitions. [2022-01-28 14:58:44,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:58:44,323 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:44,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:44,327 INFO L225 Difference]: With dead ends: 2139 [2022-01-28 14:58:44,327 INFO L226 Difference]: Without dead ends: 2101 [2022-01-28 14:58:44,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:58:44,327 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:44,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 206 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 480 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-01-28 14:58:44,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2022-01-28 14:58:44,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 1981. [2022-01-28 14:58:44,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 3.407070707070707) internal successors, (6746), 1980 states have internal predecessors, (6746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:44,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 6746 transitions. [2022-01-28 14:58:44,351 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 6746 transitions. Word has length 24 [2022-01-28 14:58:44,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:44,352 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 6746 transitions. [2022-01-28 14:58:44,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:44,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 6746 transitions. [2022-01-28 14:58:44,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:44,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:44,354 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:44,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:44,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2022-01-28 14:58:44,554 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:44,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:44,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1533333961, now seen corresponding path program 288 times [2022-01-28 14:58:44,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:44,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838315163] [2022-01-28 14:58:44,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:44,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:44,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:44,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838315163] [2022-01-28 14:58:44,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838315163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:44,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199523359] [2022-01-28 14:58:44,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:58:44,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:44,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:44,662 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:44,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-01-28 14:58:44,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:58:44,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:44,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:58:44,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:44,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-28 14:58:44,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:44,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:58:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:44,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:45,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:45,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2022-01-28 14:58:45,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:45,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:58:45,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:45,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:58:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:45,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199523359] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:45,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:45,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-01-28 14:58:45,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248865475] [2022-01-28 14:58:45,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:45,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:58:45,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:45,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:58:45,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:58:45,361 INFO L87 Difference]: Start difference. First operand 1981 states and 6746 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:45,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:45,613 INFO L93 Difference]: Finished difference Result 2248 states and 7515 transitions. [2022-01-28 14:58:45,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:58:45,613 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:45,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:45,616 INFO L225 Difference]: With dead ends: 2248 [2022-01-28 14:58:45,617 INFO L226 Difference]: Without dead ends: 2233 [2022-01-28 14:58:45,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:58:45,617 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 80 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:45,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 162 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:58:45,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2022-01-28 14:58:45,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 1973. [2022-01-28 14:58:45,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 3.4056795131845843) internal successors, (6716), 1972 states have internal predecessors, (6716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:45,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 6716 transitions. [2022-01-28 14:58:45,639 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 6716 transitions. Word has length 24 [2022-01-28 14:58:45,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:45,639 INFO L470 AbstractCegarLoop]: Abstraction has 1973 states and 6716 transitions. [2022-01-28 14:58:45,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:45,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 6716 transitions. [2022-01-28 14:58:45,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:45,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:45,642 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:45,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Ended with exit code 0 [2022-01-28 14:58:45,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:45,842 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:45,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:45,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1776248199, now seen corresponding path program 289 times [2022-01-28 14:58:45,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:45,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411876260] [2022-01-28 14:58:45,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:45,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:46,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:46,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411876260] [2022-01-28 14:58:46,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411876260] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:46,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319619268] [2022-01-28 14:58:46,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:58:46,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:46,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:46,052 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:46,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-01-28 14:58:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:46,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:58:46,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:46,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:46,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:58:46,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:46,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:46,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:46,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:58:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:46,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:47,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:47,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2022-01-28 14:58:47,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:47,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:58:47,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:47,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:58:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:47,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319619268] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:47,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:47,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:58:47,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922004271] [2022-01-28 14:58:47,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:47,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:58:47,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:47,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:58:47,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:58:47,288 INFO L87 Difference]: Start difference. First operand 1973 states and 6716 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:47,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:47,969 INFO L93 Difference]: Finished difference Result 2318 states and 7643 transitions. [2022-01-28 14:58:47,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:58:47,970 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:47,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:47,974 INFO L225 Difference]: With dead ends: 2318 [2022-01-28 14:58:47,974 INFO L226 Difference]: Without dead ends: 2196 [2022-01-28 14:58:47,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:58:47,974 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 110 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:47,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 281 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 720 Invalid, 0 Unknown, 193 Unchecked, 0.3s Time] [2022-01-28 14:58:47,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2022-01-28 14:58:47,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 1972. [2022-01-28 14:58:47,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1972 states, 1971 states have (on average 3.4053779807204463) internal successors, (6712), 1971 states have internal predecessors, (6712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:47,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1972 states to 1972 states and 6712 transitions. [2022-01-28 14:58:47,999 INFO L78 Accepts]: Start accepts. Automaton has 1972 states and 6712 transitions. Word has length 24 [2022-01-28 14:58:47,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:47,999 INFO L470 AbstractCegarLoop]: Abstraction has 1972 states and 6712 transitions. [2022-01-28 14:58:47,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:47,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1972 states and 6712 transitions. [2022-01-28 14:58:48,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:48,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:48,002 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:48,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:48,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2022-01-28 14:58:48,202 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:48,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:48,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1866872383, now seen corresponding path program 290 times [2022-01-28 14:58:48,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:48,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957151232] [2022-01-28 14:58:48,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:48,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:58:48,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:48,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957151232] [2022-01-28 14:58:48,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957151232] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:48,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290575014] [2022-01-28 14:58:48,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:58:48,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:48,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:48,386 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:48,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-01-28 14:58:48,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:58:48,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:48,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:58:48,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:48,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:48,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:58:48,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:48,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:58:48,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:58:48,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:58:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:58:48,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:49,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:49,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2022-01-28 14:58:49,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:49,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:58:49,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:49,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:58:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:58:49,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290575014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:49,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:49,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:58:49,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987005268] [2022-01-28 14:58:49,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:49,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:58:49,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:49,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:58:49,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:58:49,429 INFO L87 Difference]: Start difference. First operand 1972 states and 6712 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:50,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:50,131 INFO L93 Difference]: Finished difference Result 2572 states and 8503 transitions. [2022-01-28 14:58:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-28 14:58:50,131 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:50,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:50,136 INFO L225 Difference]: With dead ends: 2572 [2022-01-28 14:58:50,136 INFO L226 Difference]: Without dead ends: 2553 [2022-01-28 14:58:50,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:58:50,136 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 159 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:50,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 327 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 859 Invalid, 0 Unknown, 205 Unchecked, 0.3s Time] [2022-01-28 14:58:50,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2022-01-28 14:58:50,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1972. [2022-01-28 14:58:50,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1972 states, 1971 states have (on average 3.4053779807204463) internal successors, (6712), 1971 states have internal predecessors, (6712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:50,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1972 states to 1972 states and 6712 transitions. [2022-01-28 14:58:50,164 INFO L78 Accepts]: Start accepts. Automaton has 1972 states and 6712 transitions. Word has length 24 [2022-01-28 14:58:50,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:50,164 INFO L470 AbstractCegarLoop]: Abstraction has 1972 states and 6712 transitions. [2022-01-28 14:58:50,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:50,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1972 states and 6712 transitions. [2022-01-28 14:58:50,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:50,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:50,166 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:50,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-01-28 14:58:50,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-01-28 14:58:50,379 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:50,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:50,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1668931879, now seen corresponding path program 291 times [2022-01-28 14:58:50,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:50,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359120377] [2022-01-28 14:58:50,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:50,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:58:50,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:50,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359120377] [2022-01-28 14:58:50,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359120377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:50,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107434201] [2022-01-28 14:58:50,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:58:50,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:50,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:50,588 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:50,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-01-28 14:58:50,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 14:58:50,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:50,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:58:50,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:50,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:58:50,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:58:50,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:58:50,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:58:50,948 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:58:50,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:51,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:51,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 71 [2022-01-28 14:58:51,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:51,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 99 [2022-01-28 14:58:51,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:51,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 75 [2022-01-28 14:58:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:58:51,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107434201] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:51,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:51,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:58:51,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514743327] [2022-01-28 14:58:51,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:51,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:58:51,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:51,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:58:51,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:58:51,926 INFO L87 Difference]: Start difference. First operand 1972 states and 6712 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:52,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:52,617 INFO L93 Difference]: Finished difference Result 2519 states and 8349 transitions. [2022-01-28 14:58:52,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:58:52,617 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:52,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:52,622 INFO L225 Difference]: With dead ends: 2519 [2022-01-28 14:58:52,622 INFO L226 Difference]: Without dead ends: 2481 [2022-01-28 14:58:52,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:58:52,622 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 129 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:52,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 256 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:52,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2022-01-28 14:58:52,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 1968. [2022-01-28 14:58:52,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1967 states have (on average 3.4056939501779357) internal successors, (6699), 1967 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:52,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 6699 transitions. [2022-01-28 14:58:52,649 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 6699 transitions. Word has length 24 [2022-01-28 14:58:52,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:52,649 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 6699 transitions. [2022-01-28 14:58:52,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:52,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 6699 transitions. [2022-01-28 14:58:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:52,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:52,652 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:52,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-01-28 14:58:52,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:52,852 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:52,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:52,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1699679631, now seen corresponding path program 292 times [2022-01-28 14:58:52,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:52,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616697838] [2022-01-28 14:58:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:52,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:53,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:53,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616697838] [2022-01-28 14:58:53,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616697838] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:53,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718586506] [2022-01-28 14:58:53,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:58:53,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:53,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:53,051 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:53,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-01-28 14:58:53,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:58:53,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:53,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:58:53,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:53,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:53,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:53,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:53,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:58:53,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:53,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:58:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:53,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:54,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:54,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 84 [2022-01-28 14:58:54,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:54,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 99 [2022-01-28 14:58:54,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:54,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 75 [2022-01-28 14:58:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:54,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718586506] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:54,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:54,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:58:54,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410815221] [2022-01-28 14:58:54,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:54,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:58:54,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:54,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:58:54,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:58:54,435 INFO L87 Difference]: Start difference. First operand 1968 states and 6699 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:54,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:54,666 INFO L93 Difference]: Finished difference Result 2173 states and 7271 transitions. [2022-01-28 14:58:54,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:58:54,666 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:54,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:54,669 INFO L225 Difference]: With dead ends: 2173 [2022-01-28 14:58:54,669 INFO L226 Difference]: Without dead ends: 2107 [2022-01-28 14:58:54,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:58:54,670 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:54,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 163 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 475 Invalid, 0 Unknown, 12 Unchecked, 0.2s Time] [2022-01-28 14:58:54,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2022-01-28 14:58:54,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1965. [2022-01-28 14:58:54,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 3.405804480651731) internal successors, (6689), 1964 states have internal predecessors, (6689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:54,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 6689 transitions. [2022-01-28 14:58:54,693 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 6689 transitions. Word has length 24 [2022-01-28 14:58:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:54,693 INFO L470 AbstractCegarLoop]: Abstraction has 1965 states and 6689 transitions. [2022-01-28 14:58:54,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 6689 transitions. [2022-01-28 14:58:54,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:54,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:54,696 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:54,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Ended with exit code 0 [2022-01-28 14:58:54,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2022-01-28 14:58:54,896 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:54,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:54,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2008230475, now seen corresponding path program 293 times [2022-01-28 14:58:54,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:54,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908088695] [2022-01-28 14:58:54,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:54,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:55,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:55,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908088695] [2022-01-28 14:58:55,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908088695] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:55,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320462071] [2022-01-28 14:58:55,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:58:55,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:55,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:55,169 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:55,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-01-28 14:58:55,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:58:55,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:55,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:58:55,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:55,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:55,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:55,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:55,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:58:55,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:55,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:58:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:55,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:55,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:55,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 99 [2022-01-28 14:58:56,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:56,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2022-01-28 14:58:56,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:56,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2022-01-28 14:58:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:56,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320462071] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:56,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:56,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:58:56,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749985809] [2022-01-28 14:58:56,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:56,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:58:56,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:56,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:58:56,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:58:56,248 INFO L87 Difference]: Start difference. First operand 1965 states and 6689 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:57,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:57,154 INFO L93 Difference]: Finished difference Result 2244 states and 7429 transitions. [2022-01-28 14:58:57,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:58:57,154 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:57,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:57,158 INFO L225 Difference]: With dead ends: 2244 [2022-01-28 14:58:57,158 INFO L226 Difference]: Without dead ends: 2124 [2022-01-28 14:58:57,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:58:57,158 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 116 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:57,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 244 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 699 Invalid, 0 Unknown, 299 Unchecked, 0.3s Time] [2022-01-28 14:58:57,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2022-01-28 14:58:57,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1963. [2022-01-28 14:58:57,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.4046890927624873) internal successors, (6680), 1962 states have internal predecessors, (6680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:57,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 6680 transitions. [2022-01-28 14:58:57,182 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 6680 transitions. Word has length 24 [2022-01-28 14:58:57,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:57,182 INFO L470 AbstractCegarLoop]: Abstraction has 1963 states and 6680 transitions. [2022-01-28 14:58:57,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:57,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 6680 transitions. [2022-01-28 14:58:57,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:57,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:57,185 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:57,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Ended with exit code 0 [2022-01-28 14:58:57,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:57,385 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:57,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:57,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1881462503, now seen corresponding path program 294 times [2022-01-28 14:58:57,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:57,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878794863] [2022-01-28 14:58:57,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:57,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:57,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:57,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878794863] [2022-01-28 14:58:57,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878794863] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:57,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451406494] [2022-01-28 14:58:57,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:58:57,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:57,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:57,534 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:58:57,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-01-28 14:58:57,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:58:57,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:57,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:58:57,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:57,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:57,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:58:57,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:57,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:58:57,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:57,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:58:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:57,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:58,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:58,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 84 [2022-01-28 14:58:58,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:58,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 99 [2022-01-28 14:58:58,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:58,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 75 [2022-01-28 14:58:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:58:58,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451406494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:58,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:58,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 14:58:58,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137978595] [2022-01-28 14:58:58,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:58,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:58:58,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:58,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:58:58,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:58:58,999 INFO L87 Difference]: Start difference. First operand 1963 states and 6680 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:59,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:59,906 INFO L93 Difference]: Finished difference Result 2408 states and 7881 transitions. [2022-01-28 14:58:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:58:59,906 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:58:59,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:59,910 INFO L225 Difference]: With dead ends: 2408 [2022-01-28 14:58:59,910 INFO L226 Difference]: Without dead ends: 2253 [2022-01-28 14:58:59,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:58:59,911 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 180 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:59,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 241 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 676 Invalid, 0 Unknown, 150 Unchecked, 0.3s Time] [2022-01-28 14:58:59,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2022-01-28 14:58:59,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1970. [2022-01-28 14:58:59,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 3.4083291010665313) internal successors, (6711), 1969 states have internal predecessors, (6711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:59,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 6711 transitions. [2022-01-28 14:58:59,936 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 6711 transitions. Word has length 24 [2022-01-28 14:58:59,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:59,936 INFO L470 AbstractCegarLoop]: Abstraction has 1970 states and 6711 transitions. [2022-01-28 14:58:59,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:59,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 6711 transitions. [2022-01-28 14:58:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:58:59,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:59,939 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:59,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-01-28 14:59:00,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2022-01-28 14:59:00,139 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:00,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:00,140 INFO L85 PathProgramCache]: Analyzing trace with hash 265017135, now seen corresponding path program 295 times [2022-01-28 14:59:00,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:00,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148599917] [2022-01-28 14:59:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:00,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:00,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:00,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148599917] [2022-01-28 14:59:00,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148599917] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:00,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899867687] [2022-01-28 14:59:00,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:59:00,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:00,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:00,315 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:00,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-01-28 14:59:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:00,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:59:00,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:00,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:59:00,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:59:00,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:59:00,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:59:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:00,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:01,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:01,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:59:01,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:01,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2022-01-28 14:59:01,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:01,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2022-01-28 14:59:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:01,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899867687] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:01,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:01,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:59:01,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875573697] [2022-01-28 14:59:01,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:01,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:59:01,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:01,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:59:01,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:59:01,354 INFO L87 Difference]: Start difference. First operand 1970 states and 6711 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:01,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:01,924 INFO L93 Difference]: Finished difference Result 2209 states and 7323 transitions. [2022-01-28 14:59:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:59:01,924 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:01,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:01,927 INFO L225 Difference]: With dead ends: 2209 [2022-01-28 14:59:01,928 INFO L226 Difference]: Without dead ends: 2174 [2022-01-28 14:59:01,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:59:01,928 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 93 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:01,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 248 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:59:01,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2022-01-28 14:59:01,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 1968. [2022-01-28 14:59:01,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1967 states have (on average 3.409252669039146) internal successors, (6706), 1967 states have internal predecessors, (6706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:01,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 6706 transitions. [2022-01-28 14:59:01,960 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 6706 transitions. Word has length 24 [2022-01-28 14:59:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:01,960 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 6706 transitions. [2022-01-28 14:59:01,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:01,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 6706 transitions. [2022-01-28 14:59:01,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:01,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:01,963 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:01,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:02,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2022-01-28 14:59:02,164 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:02,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:02,164 INFO L85 PathProgramCache]: Analyzing trace with hash -24157367, now seen corresponding path program 296 times [2022-01-28 14:59:02,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:02,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603595677] [2022-01-28 14:59:02,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:02,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:02,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:02,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603595677] [2022-01-28 14:59:02,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603595677] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:02,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140254879] [2022-01-28 14:59:02,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:59:02,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:02,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:02,340 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:02,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-01-28 14:59:02,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:59:02,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:02,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:59:02,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:02,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-01-28 14:59:02,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 14:59:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:02,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:02,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:02,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-28 14:59:03,047 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:03,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 57 [2022-01-28 14:59:03,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2022-01-28 14:59:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:03,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140254879] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:03,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:03,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 14:59:03,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866811729] [2022-01-28 14:59:03,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:03,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:59:03,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:03,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:59:03,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:59:03,073 INFO L87 Difference]: Start difference. First operand 1968 states and 6706 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:04,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:04,767 INFO L93 Difference]: Finished difference Result 3123 states and 10136 transitions. [2022-01-28 14:59:04,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-28 14:59:04,767 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:04,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:04,773 INFO L225 Difference]: With dead ends: 3123 [2022-01-28 14:59:04,773 INFO L226 Difference]: Without dead ends: 2988 [2022-01-28 14:59:04,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=413, Invalid=1749, Unknown=0, NotChecked=0, Total=2162 [2022-01-28 14:59:04,773 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 250 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:04,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 363 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:59:04,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2022-01-28 14:59:04,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 1985. [2022-01-28 14:59:04,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1984 states have (on average 3.4077620967741935) internal successors, (6761), 1984 states have internal predecessors, (6761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 6761 transitions. [2022-01-28 14:59:04,806 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 6761 transitions. Word has length 24 [2022-01-28 14:59:04,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:04,806 INFO L470 AbstractCegarLoop]: Abstraction has 1985 states and 6761 transitions. [2022-01-28 14:59:04,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:04,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 6761 transitions. [2022-01-28 14:59:04,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:04,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:04,809 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:04,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:05,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-01-28 14:59:05,009 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:05,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:05,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2126417585, now seen corresponding path program 297 times [2022-01-28 14:59:05,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:05,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503017975] [2022-01-28 14:59:05,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:05,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:05,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:05,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503017975] [2022-01-28 14:59:05,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503017975] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:05,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777647481] [2022-01-28 14:59:05,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:59:05,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:05,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:05,159 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:05,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-01-28 14:59:05,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:59:05,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:05,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:59:05,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:05,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:59:05,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:05,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:59:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:05,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:05,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:05,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-28 14:59:05,893 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:05,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2022-01-28 14:59:05,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2022-01-28 14:59:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:05,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777647481] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:05,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:05,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:59:05,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127021991] [2022-01-28 14:59:05,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:05,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:59:05,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:05,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:59:05,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:05,905 INFO L87 Difference]: Start difference. First operand 1985 states and 6761 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:07,652 INFO L93 Difference]: Finished difference Result 2792 states and 9098 transitions. [2022-01-28 14:59:07,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-28 14:59:07,653 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:07,657 INFO L225 Difference]: With dead ends: 2792 [2022-01-28 14:59:07,657 INFO L226 Difference]: Without dead ends: 2664 [2022-01-28 14:59:07,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=476, Invalid=2176, Unknown=0, NotChecked=0, Total=2652 [2022-01-28 14:59:07,658 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 208 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:07,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 363 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:59:07,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2022-01-28 14:59:07,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 1995. [2022-01-28 14:59:07,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 3.405717151454363) internal successors, (6791), 1994 states have internal predecessors, (6791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:07,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 6791 transitions. [2022-01-28 14:59:07,686 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 6791 transitions. Word has length 24 [2022-01-28 14:59:07,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:07,686 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 6791 transitions. [2022-01-28 14:59:07,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:07,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 6791 transitions. [2022-01-28 14:59:07,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:07,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:07,689 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:07,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-01-28 14:59:07,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-01-28 14:59:07,889 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:07,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:07,889 INFO L85 PathProgramCache]: Analyzing trace with hash -962484411, now seen corresponding path program 298 times [2022-01-28 14:59:07,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:07,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966504486] [2022-01-28 14:59:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:07,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:08,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:08,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966504486] [2022-01-28 14:59:08,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966504486] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:08,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293067762] [2022-01-28 14:59:08,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:59:08,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:08,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:08,056 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:08,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-01-28 14:59:08,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:59:08,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:08,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:59:08,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:08,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-01-28 14:59:08,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-28 14:59:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:08,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:08,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:08,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-28 14:59:09,098 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:09,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 57 [2022-01-28 14:59:09,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2022-01-28 14:59:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:09,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293067762] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:09,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:09,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 14:59:09,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303540876] [2022-01-28 14:59:09,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:09,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:59:09,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:09,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:59:09,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:59:09,123 INFO L87 Difference]: Start difference. First operand 1995 states and 6791 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:11,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:11,983 INFO L93 Difference]: Finished difference Result 3663 states and 11501 transitions. [2022-01-28 14:59:11,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-28 14:59:11,983 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:11,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:11,989 INFO L225 Difference]: With dead ends: 3663 [2022-01-28 14:59:11,990 INFO L226 Difference]: Without dead ends: 3490 [2022-01-28 14:59:11,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=615, Invalid=2465, Unknown=0, NotChecked=0, Total=3080 [2022-01-28 14:59:11,990 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 293 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:11,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 487 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1459 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 14:59:11,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2022-01-28 14:59:12,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 1998. [2022-01-28 14:59:12,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1998 states, 1997 states have (on average 3.4066099148723086) internal successors, (6803), 1997 states have internal predecessors, (6803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:12,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 6803 transitions. [2022-01-28 14:59:12,028 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 6803 transitions. Word has length 24 [2022-01-28 14:59:12,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:12,028 INFO L470 AbstractCegarLoop]: Abstraction has 1998 states and 6803 transitions. [2022-01-28 14:59:12,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:12,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 6803 transitions. [2022-01-28 14:59:12,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:12,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:12,031 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:12,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Ended with exit code 0 [2022-01-28 14:59:12,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:12,232 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:12,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:12,232 INFO L85 PathProgramCache]: Analyzing trace with hash 409259049, now seen corresponding path program 299 times [2022-01-28 14:59:12,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:12,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924665562] [2022-01-28 14:59:12,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:12,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:12,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:12,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924665562] [2022-01-28 14:59:12,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924665562] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:12,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877762554] [2022-01-28 14:59:12,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:59:12,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:12,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:12,410 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:12,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-01-28 14:59:12,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:59:12,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:12,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:59:12,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:12,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:59:12,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:12,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:59:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:12,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:12,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:12,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 51 [2022-01-28 14:59:13,152 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:13,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2022-01-28 14:59:13,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2022-01-28 14:59:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:13,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877762554] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:13,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:13,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 14:59:13,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298012930] [2022-01-28 14:59:13,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:13,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 14:59:13,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:13,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 14:59:13,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:59:13,166 INFO L87 Difference]: Start difference. First operand 1998 states and 6803 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:14,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:14,021 INFO L93 Difference]: Finished difference Result 2445 states and 8183 transitions. [2022-01-28 14:59:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:59:14,022 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:14,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:14,026 INFO L225 Difference]: With dead ends: 2445 [2022-01-28 14:59:14,026 INFO L226 Difference]: Without dead ends: 2386 [2022-01-28 14:59:14,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 14:59:14,026 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 124 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:14,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 306 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:59:14,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2022-01-28 14:59:14,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 2002. [2022-01-28 14:59:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 3.4062968515742127) internal successors, (6816), 2001 states have internal predecessors, (6816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 6816 transitions. [2022-01-28 14:59:14,052 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 6816 transitions. Word has length 24 [2022-01-28 14:59:14,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:14,052 INFO L470 AbstractCegarLoop]: Abstraction has 2002 states and 6816 transitions. [2022-01-28 14:59:14,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 6816 transitions. [2022-01-28 14:59:14,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:14,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:14,055 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:14,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-01-28 14:59:14,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:14,256 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:14,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:14,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1573192223, now seen corresponding path program 300 times [2022-01-28 14:59:14,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:14,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994344284] [2022-01-28 14:59:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:14,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:14,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:14,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994344284] [2022-01-28 14:59:14,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994344284] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:14,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207851835] [2022-01-28 14:59:14,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:59:14,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:14,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:14,438 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:14,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-01-28 14:59:14,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:59:14,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:14,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:59:14,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:14,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2022-01-28 14:59:14,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2022-01-28 14:59:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:14,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:15,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:15,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2022-01-28 14:59:15,424 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:15,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 83 [2022-01-28 14:59:15,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 56 [2022-01-28 14:59:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:15,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207851835] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:15,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:15,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-01-28 14:59:15,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347622802] [2022-01-28 14:59:15,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:15,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:59:15,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:15,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:59:15,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:59:15,453 INFO L87 Difference]: Start difference. First operand 2002 states and 6816 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:16,487 INFO L93 Difference]: Finished difference Result 2534 states and 8428 transitions. [2022-01-28 14:59:16,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:59:16,487 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:16,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:16,491 INFO L225 Difference]: With dead ends: 2534 [2022-01-28 14:59:16,491 INFO L226 Difference]: Without dead ends: 2464 [2022-01-28 14:59:16,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 14:59:16,492 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 82 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:16,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 342 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:59:16,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2022-01-28 14:59:16,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 2002. [2022-01-28 14:59:16,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 3.4062968515742127) internal successors, (6816), 2001 states have internal predecessors, (6816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:16,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 6816 transitions. [2022-01-28 14:59:16,517 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 6816 transitions. Word has length 24 [2022-01-28 14:59:16,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:16,517 INFO L470 AbstractCegarLoop]: Abstraction has 2002 states and 6816 transitions. [2022-01-28 14:59:16,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:16,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 6816 transitions. [2022-01-28 14:59:16,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:16,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:16,520 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:16,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-01-28 14:59:16,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:16,720 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:16,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:16,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1246157495, now seen corresponding path program 301 times [2022-01-28 14:59:16,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:16,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697657386] [2022-01-28 14:59:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:16,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:16,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:16,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697657386] [2022-01-28 14:59:16,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697657386] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:16,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668456732] [2022-01-28 14:59:16,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:59:16,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:16,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:16,941 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:16,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-01-28 14:59:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:16,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:59:16,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:17,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:59:17,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:59:17,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:59:17,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:59:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:17,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:17,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:17,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 84 [2022-01-28 14:59:17,946 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:17,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 57 [2022-01-28 14:59:17,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2022-01-28 14:59:17,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:17,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668456732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:17,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:17,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:59:17,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428696324] [2022-01-28 14:59:17,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:17,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:59:17,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:17,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:59:17,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:17,980 INFO L87 Difference]: Start difference. First operand 2002 states and 6816 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:19,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:19,635 INFO L93 Difference]: Finished difference Result 2907 states and 9502 transitions. [2022-01-28 14:59:19,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-28 14:59:19,635 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:19,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:19,640 INFO L225 Difference]: With dead ends: 2907 [2022-01-28 14:59:19,640 INFO L226 Difference]: Without dead ends: 2792 [2022-01-28 14:59:19,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=410, Invalid=2040, Unknown=0, NotChecked=0, Total=2450 [2022-01-28 14:59:19,641 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 191 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:19,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 366 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:59:19,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2022-01-28 14:59:19,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2004. [2022-01-28 14:59:19,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.4073889166250626) internal successors, (6825), 2003 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:19,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 6825 transitions. [2022-01-28 14:59:19,671 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 6825 transitions. Word has length 24 [2022-01-28 14:59:19,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:19,671 INFO L470 AbstractCegarLoop]: Abstraction has 2004 states and 6825 transitions. [2022-01-28 14:59:19,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:19,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 6825 transitions. [2022-01-28 14:59:19,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:19,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:19,673 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:19,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:19,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2022-01-28 14:59:19,874 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:19,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:19,874 INFO L85 PathProgramCache]: Analyzing trace with hash -725300047, now seen corresponding path program 302 times [2022-01-28 14:59:19,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:19,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95681834] [2022-01-28 14:59:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:19,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:19,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:19,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95681834] [2022-01-28 14:59:19,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95681834] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:19,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894284935] [2022-01-28 14:59:19,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:59:19,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:19,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:19,988 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:19,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-01-28 14:59:20,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:59:20,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:20,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:59:20,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:20,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-28 14:59:20,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:20,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:59:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:20,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:20,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:20,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 51 [2022-01-28 14:59:20,771 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:20,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 57 [2022-01-28 14:59:20,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2022-01-28 14:59:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:20,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894284935] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:20,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:20,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:59:20,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911504268] [2022-01-28 14:59:20,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:20,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:59:20,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:20,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:59:20,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:20,798 INFO L87 Difference]: Start difference. First operand 2004 states and 6825 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:22,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:22,353 INFO L93 Difference]: Finished difference Result 3003 states and 9832 transitions. [2022-01-28 14:59:22,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-28 14:59:22,354 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:22,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:22,358 INFO L225 Difference]: With dead ends: 3003 [2022-01-28 14:59:22,359 INFO L226 Difference]: Without dead ends: 2867 [2022-01-28 14:59:22,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=444, Invalid=2106, Unknown=0, NotChecked=0, Total=2550 [2022-01-28 14:59:22,359 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 162 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:22,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 346 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1331 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:59:22,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2022-01-28 14:59:22,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2015. [2022-01-28 14:59:22,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.4061569016881825) internal successors, (6860), 2014 states have internal predecessors, (6860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:22,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 6860 transitions. [2022-01-28 14:59:22,388 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 6860 transitions. Word has length 24 [2022-01-28 14:59:22,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:22,388 INFO L470 AbstractCegarLoop]: Abstraction has 2015 states and 6860 transitions. [2022-01-28 14:59:22,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:22,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 6860 transitions. [2022-01-28 14:59:22,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:22,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:22,391 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:22,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:22,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:22,591 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:22,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:22,591 INFO L85 PathProgramCache]: Analyzing trace with hash 438633127, now seen corresponding path program 303 times [2022-01-28 14:59:22,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:22,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371174540] [2022-01-28 14:59:22,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:22,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:22,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:22,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371174540] [2022-01-28 14:59:22,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371174540] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:22,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43227197] [2022-01-28 14:59:22,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:59:22,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:22,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:22,709 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:22,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-01-28 14:59:22,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:59:22,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:22,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:59:22,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:22,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-28 14:59:22,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:59:22,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:59:22,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:59:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:22,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:23,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:23,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2022-01-28 14:59:23,562 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:23,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 85 [2022-01-28 14:59:23,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 58 [2022-01-28 14:59:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:23,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43227197] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:23,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:23,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:59:23,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720651143] [2022-01-28 14:59:23,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:23,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:59:23,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:23,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:59:23,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:23,594 INFO L87 Difference]: Start difference. First operand 2015 states and 6860 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:24,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:24,677 INFO L93 Difference]: Finished difference Result 2754 states and 9089 transitions. [2022-01-28 14:59:24,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 14:59:24,677 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:24,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:24,682 INFO L225 Difference]: With dead ends: 2754 [2022-01-28 14:59:24,682 INFO L226 Difference]: Without dead ends: 2638 [2022-01-28 14:59:24,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2022-01-28 14:59:24,682 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 144 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:24,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 332 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1226 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:59:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2022-01-28 14:59:24,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2016. [2022-01-28 14:59:24,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2015 states have (on average 3.4069478908188584) internal successors, (6865), 2015 states have internal predecessors, (6865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:24,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 6865 transitions. [2022-01-28 14:59:24,710 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 6865 transitions. Word has length 24 [2022-01-28 14:59:24,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:24,710 INFO L470 AbstractCegarLoop]: Abstraction has 2016 states and 6865 transitions. [2022-01-28 14:59:24,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:24,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 6865 transitions. [2022-01-28 14:59:24,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:24,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:24,720 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:24,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-01-28 14:59:24,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:24,920 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:24,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:24,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1914250705, now seen corresponding path program 304 times [2022-01-28 14:59:24,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:24,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175143946] [2022-01-28 14:59:24,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:24,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:25,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:25,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175143946] [2022-01-28 14:59:25,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175143946] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:25,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138717529] [2022-01-28 14:59:25,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:59:25,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:25,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:25,084 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:25,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-01-28 14:59:25,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:59:25,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:25,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:59:25,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:25,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 14:59:25,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:59:25,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:59:25,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:59:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:25,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:25,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:25,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 84 [2022-01-28 14:59:26,065 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:26,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 57 [2022-01-28 14:59:26,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2022-01-28 14:59:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:26,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138717529] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:26,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:26,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:59:26,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458547100] [2022-01-28 14:59:26,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:26,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:59:26,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:26,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:59:26,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:26,093 INFO L87 Difference]: Start difference. First operand 2016 states and 6865 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:27,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:27,618 INFO L93 Difference]: Finished difference Result 3065 states and 9956 transitions. [2022-01-28 14:59:27,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-28 14:59:27,618 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:27,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:27,623 INFO L225 Difference]: With dead ends: 3065 [2022-01-28 14:59:27,623 INFO L226 Difference]: Without dead ends: 2950 [2022-01-28 14:59:27,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=410, Invalid=2040, Unknown=0, NotChecked=0, Total=2450 [2022-01-28 14:59:27,624 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 199 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:27,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 321 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:59:27,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2022-01-28 14:59:27,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 2016. [2022-01-28 14:59:27,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2015 states have (on average 3.4069478908188584) internal successors, (6865), 2015 states have internal predecessors, (6865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:27,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 6865 transitions. [2022-01-28 14:59:27,656 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 6865 transitions. Word has length 24 [2022-01-28 14:59:27,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:27,656 INFO L470 AbstractCegarLoop]: Abstraction has 2016 states and 6865 transitions. [2022-01-28 14:59:27,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:27,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 6865 transitions. [2022-01-28 14:59:27,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:27,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:27,658 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:27,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:27,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2022-01-28 14:59:27,859 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:27,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:27,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1604330619, now seen corresponding path program 305 times [2022-01-28 14:59:27,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:27,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118050757] [2022-01-28 14:59:27,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:27,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:28,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:28,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118050757] [2022-01-28 14:59:28,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118050757] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:28,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277362140] [2022-01-28 14:59:28,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:59:28,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:28,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:28,029 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:28,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-01-28 14:59:28,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 14:59:28,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:28,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:59:28,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:28,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-01-28 14:59:28,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 54 [2022-01-28 14:59:28,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-01-28 14:59:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:28,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:28,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:28,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2022-01-28 14:59:29,023 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:29,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 83 [2022-01-28 14:59:29,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 56 [2022-01-28 14:59:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:29,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277362140] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:29,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:29,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-01-28 14:59:29,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144191658] [2022-01-28 14:59:29,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:29,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:59:29,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:29,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:59:29,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:59:29,053 INFO L87 Difference]: Start difference. First operand 2016 states and 6865 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:30,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:30,175 INFO L93 Difference]: Finished difference Result 2873 states and 9390 transitions. [2022-01-28 14:59:30,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:59:30,175 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:30,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:30,180 INFO L225 Difference]: With dead ends: 2873 [2022-01-28 14:59:30,180 INFO L226 Difference]: Without dead ends: 2787 [2022-01-28 14:59:30,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=265, Invalid=1067, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 14:59:30,181 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 175 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:30,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 313 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:59:30,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2022-01-28 14:59:30,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2017. [2022-01-28 14:59:30,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 3.4077380952380953) internal successors, (6870), 2016 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 6870 transitions. [2022-01-28 14:59:30,212 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 6870 transitions. Word has length 24 [2022-01-28 14:59:30,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:30,212 INFO L470 AbstractCegarLoop]: Abstraction has 2017 states and 6870 transitions. [2022-01-28 14:59:30,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:30,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 6870 transitions. [2022-01-28 14:59:30,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:30,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:30,214 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:30,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:30,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2022-01-28 14:59:30,415 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:30,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:30,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1043652717, now seen corresponding path program 306 times [2022-01-28 14:59:30,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:30,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104074688] [2022-01-28 14:59:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:30,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:30,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:30,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104074688] [2022-01-28 14:59:30,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104074688] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:30,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746333198] [2022-01-28 14:59:30,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:59:30,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:30,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:30,609 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:30,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-01-28 14:59:30,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:59:30,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:30,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:59:30,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:30,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 14:59:30,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 14:59:30,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:59:30,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:59:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:30,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:31,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:31,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 49 [2022-01-28 14:59:31,425 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:31,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2022-01-28 14:59:31,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2022-01-28 14:59:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:31,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746333198] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:31,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:31,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:59:31,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280385561] [2022-01-28 14:59:31,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:31,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:59:31,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:31,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:59:31,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:31,437 INFO L87 Difference]: Start difference. First operand 2017 states and 6870 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:34,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:34,255 INFO L93 Difference]: Finished difference Result 3055 states and 9808 transitions. [2022-01-28 14:59:34,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-28 14:59:34,255 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:34,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:34,260 INFO L225 Difference]: With dead ends: 3055 [2022-01-28 14:59:34,260 INFO L226 Difference]: Without dead ends: 2926 [2022-01-28 14:59:34,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=586, Invalid=2384, Unknown=0, NotChecked=0, Total=2970 [2022-01-28 14:59:34,261 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 240 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:34,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 452 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:59:34,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2022-01-28 14:59:34,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2020. [2022-01-28 14:59:34,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.4066369489846458) internal successors, (6878), 2019 states have internal predecessors, (6878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:34,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 6878 transitions. [2022-01-28 14:59:34,291 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 6878 transitions. Word has length 24 [2022-01-28 14:59:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:34,291 INFO L470 AbstractCegarLoop]: Abstraction has 2020 states and 6878 transitions. [2022-01-28 14:59:34,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:34,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 6878 transitions. [2022-01-28 14:59:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:34,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:34,293 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:34,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:34,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-01-28 14:59:34,494 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:34,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:34,494 INFO L85 PathProgramCache]: Analyzing trace with hash -495703883, now seen corresponding path program 307 times [2022-01-28 14:59:34,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:34,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138744420] [2022-01-28 14:59:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:34,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:34,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:34,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:34,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138744420] [2022-01-28 14:59:34,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138744420] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:34,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091896485] [2022-01-28 14:59:34,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:59:34,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:34,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:34,734 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:34,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-01-28 14:59:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:34,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:59:34,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:34,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:34,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:35,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:35,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:59:35,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-28 14:59:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:35,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:35,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:35,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:59:35,955 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:35,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 50 [2022-01-28 14:59:35,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-01-28 14:59:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:35,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091896485] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:35,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:35,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:59:35,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392002785] [2022-01-28 14:59:35,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:35,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:59:35,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:35,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:59:35,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:35,982 INFO L87 Difference]: Start difference. First operand 2020 states and 6878 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:36,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:36,627 INFO L93 Difference]: Finished difference Result 2498 states and 8363 transitions. [2022-01-28 14:59:36,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:59:36,627 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:36,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:36,631 INFO L225 Difference]: With dead ends: 2498 [2022-01-28 14:59:36,631 INFO L226 Difference]: Without dead ends: 2416 [2022-01-28 14:59:36,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 14:59:36,631 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 85 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:36,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 286 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 483 Invalid, 0 Unknown, 159 Unchecked, 0.2s Time] [2022-01-28 14:59:36,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2022-01-28 14:59:36,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2023. [2022-01-28 14:59:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.407517309594461) internal successors, (6890), 2022 states have internal predecessors, (6890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6890 transitions. [2022-01-28 14:59:36,657 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6890 transitions. Word has length 24 [2022-01-28 14:59:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:36,657 INFO L470 AbstractCegarLoop]: Abstraction has 2023 states and 6890 transitions. [2022-01-28 14:59:36,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:36,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6890 transitions. [2022-01-28 14:59:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:36,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:36,659 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:36,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:36,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-01-28 14:59:36,860 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:36,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:36,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1344326355, now seen corresponding path program 308 times [2022-01-28 14:59:36,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:36,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878042158] [2022-01-28 14:59:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:36,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:37,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:37,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878042158] [2022-01-28 14:59:37,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878042158] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:37,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148396966] [2022-01-28 14:59:37,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:59:37,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:37,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:37,076 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:37,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-01-28 14:59:37,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:59:37,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:37,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:59:37,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:37,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:37,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:37,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:37,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:59:37,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 14:59:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:37,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:37,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:37,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:59:38,287 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:38,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 51 [2022-01-28 14:59:38,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-01-28 14:59:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:38,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148396966] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:38,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:38,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:59:38,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198894217] [2022-01-28 14:59:38,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:38,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:59:38,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:38,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:59:38,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:38,314 INFO L87 Difference]: Start difference. First operand 2023 states and 6890 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:38,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:38,410 INFO L93 Difference]: Finished difference Result 2392 states and 8121 transitions. [2022-01-28 14:59:38,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:59:38,410 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:38,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:38,414 INFO L225 Difference]: With dead ends: 2392 [2022-01-28 14:59:38,414 INFO L226 Difference]: Without dead ends: 2353 [2022-01-28 14:59:38,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:38,415 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:38,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 407 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 194 Invalid, 0 Unknown, 224 Unchecked, 0.1s Time] [2022-01-28 14:59:38,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2022-01-28 14:59:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 2023. [2022-01-28 14:59:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.406528189910979) internal successors, (6888), 2022 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6888 transitions. [2022-01-28 14:59:38,440 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6888 transitions. Word has length 24 [2022-01-28 14:59:38,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:38,440 INFO L470 AbstractCegarLoop]: Abstraction has 2023 states and 6888 transitions. [2022-01-28 14:59:38,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:38,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6888 transitions. [2022-01-28 14:59:38,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:38,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:38,443 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:38,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:38,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-01-28 14:59:38,643 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:38,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:38,643 INFO L85 PathProgramCache]: Analyzing trace with hash -187153039, now seen corresponding path program 309 times [2022-01-28 14:59:38,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:38,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679447477] [2022-01-28 14:59:38,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:38,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:38,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:38,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679447477] [2022-01-28 14:59:38,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679447477] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:38,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422747502] [2022-01-28 14:59:38,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:59:38,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:38,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:38,914 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:38,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-01-28 14:59:38,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:59:38,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:38,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:59:38,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:39,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:39,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:39,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:39,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:59:39,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:59:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:39,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:39,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:39,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:59:40,092 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:40,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 50 [2022-01-28 14:59:40,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-01-28 14:59:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:40,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422747502] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:40,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:40,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:59:40,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989518750] [2022-01-28 14:59:40,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:40,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:59:40,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:40,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:59:40,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:40,117 INFO L87 Difference]: Start difference. First operand 2023 states and 6888 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:40,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:40,796 INFO L93 Difference]: Finished difference Result 2358 states and 7944 transitions. [2022-01-28 14:59:40,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:59:40,797 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:40,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:40,801 INFO L225 Difference]: With dead ends: 2358 [2022-01-28 14:59:40,801 INFO L226 Difference]: Without dead ends: 2276 [2022-01-28 14:59:40,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 14:59:40,801 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 129 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 660 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:40,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 423 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 623 Invalid, 0 Unknown, 660 Unchecked, 0.3s Time] [2022-01-28 14:59:40,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2022-01-28 14:59:40,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 2024. [2022-01-28 14:59:40,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 3.40731586752348) internal successors, (6893), 2023 states have internal predecessors, (6893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 6893 transitions. [2022-01-28 14:59:40,835 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 6893 transitions. Word has length 24 [2022-01-28 14:59:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:40,835 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 6893 transitions. [2022-01-28 14:59:40,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:40,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 6893 transitions. [2022-01-28 14:59:40,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:40,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:40,838 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:40,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Ended with exit code 0 [2022-01-28 14:59:41,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:41,038 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:41,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:41,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1623273525, now seen corresponding path program 310 times [2022-01-28 14:59:41,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:41,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124349397] [2022-01-28 14:59:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:41,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:41,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:41,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124349397] [2022-01-28 14:59:41,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124349397] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:41,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697542799] [2022-01-28 14:59:41,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:59:41,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:41,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:41,278 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:41,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-01-28 14:59:41,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:59:41,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:41,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:59:41,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:41,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:41,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:41,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:41,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:59:41,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:59:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:41,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:42,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:42,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:59:42,488 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:42,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 57 [2022-01-28 14:59:42,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2022-01-28 14:59:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:42,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697542799] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:42,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:42,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:59:42,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754503339] [2022-01-28 14:59:42,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:42,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:59:42,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:42,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:59:42,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:42,517 INFO L87 Difference]: Start difference. First operand 2024 states and 6893 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:42,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:42,958 INFO L93 Difference]: Finished difference Result 2360 states and 7935 transitions. [2022-01-28 14:59:42,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:59:42,959 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:42,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:42,963 INFO L225 Difference]: With dead ends: 2360 [2022-01-28 14:59:42,963 INFO L226 Difference]: Without dead ends: 2286 [2022-01-28 14:59:42,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:59:42,963 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 100 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 466 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:42,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 256 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 421 Invalid, 0 Unknown, 466 Unchecked, 0.2s Time] [2022-01-28 14:59:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2022-01-28 14:59:42,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 2024. [2022-01-28 14:59:42,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 3.40731586752348) internal successors, (6893), 2023 states have internal predecessors, (6893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 6893 transitions. [2022-01-28 14:59:42,990 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 6893 transitions. Word has length 24 [2022-01-28 14:59:42,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:42,990 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 6893 transitions. [2022-01-28 14:59:42,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:42,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 6893 transitions. [2022-01-28 14:59:42,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:42,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:42,992 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:43,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:43,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:43,193 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:43,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:43,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1840021813, now seen corresponding path program 311 times [2022-01-28 14:59:43,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:43,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119600476] [2022-01-28 14:59:43,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:43,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:59:43,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:43,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119600476] [2022-01-28 14:59:43,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119600476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:43,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721145112] [2022-01-28 14:59:43,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:59:43,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:43,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:43,427 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:43,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-01-28 14:59:43,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:59:43,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:43,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:59:43,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:43,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:43,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:43,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:43,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:59:43,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:59:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:59:43,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:44,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:44,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 84 [2022-01-28 14:59:44,705 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:44,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 83 [2022-01-28 14:59:44,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 56 [2022-01-28 14:59:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:59:44,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721145112] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:44,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:44,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:59:44,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053812986] [2022-01-28 14:59:44,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:44,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:59:44,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:44,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:59:44,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:44,736 INFO L87 Difference]: Start difference. First operand 2024 states and 6893 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:45,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:45,014 INFO L93 Difference]: Finished difference Result 2277 states and 7744 transitions. [2022-01-28 14:59:45,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:59:45,015 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:45,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:45,018 INFO L225 Difference]: With dead ends: 2277 [2022-01-28 14:59:45,018 INFO L226 Difference]: Without dead ends: 2243 [2022-01-28 14:59:45,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:59:45,018 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 54 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:45,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 146 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 261 Invalid, 0 Unknown, 106 Unchecked, 0.1s Time] [2022-01-28 14:59:45,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2243 states. [2022-01-28 14:59:45,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2243 to 2024. [2022-01-28 14:59:45,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 3.40731586752348) internal successors, (6893), 2023 states have internal predecessors, (6893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:45,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 6893 transitions. [2022-01-28 14:59:45,045 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 6893 transitions. Word has length 24 [2022-01-28 14:59:45,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:45,045 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 6893 transitions. [2022-01-28 14:59:45,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:45,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 6893 transitions. [2022-01-28 14:59:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:45,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:45,048 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:45,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-01-28 14:59:45,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2022-01-28 14:59:45,248 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:45,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:45,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1055677719, now seen corresponding path program 312 times [2022-01-28 14:59:45,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:45,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476214956] [2022-01-28 14:59:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:45,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:45,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:45,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476214956] [2022-01-28 14:59:45,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476214956] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:45,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303992779] [2022-01-28 14:59:45,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:59:45,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:45,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:45,494 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:45,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-01-28 14:59:45,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:59:45,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:45,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:59:45,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:45,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:45,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:45,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:45,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:59:45,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 14:59:45,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 14:59:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:45,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:46,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:46,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 99 [2022-01-28 14:59:46,520 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:46,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 36 [2022-01-28 14:59:46,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2022-01-28 14:59:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:46,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303992779] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:46,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:46,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:59:46,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913674940] [2022-01-28 14:59:46,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:46,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:59:46,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:46,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:59:46,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:46,533 INFO L87 Difference]: Start difference. First operand 2024 states and 6893 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:47,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:47,228 INFO L93 Difference]: Finished difference Result 2386 states and 7992 transitions. [2022-01-28 14:59:47,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:59:47,228 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:47,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:47,233 INFO L225 Difference]: With dead ends: 2386 [2022-01-28 14:59:47,233 INFO L226 Difference]: Without dead ends: 2308 [2022-01-28 14:59:47,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 14:59:47,233 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 91 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:47,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 344 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 349 Invalid, 0 Unknown, 308 Unchecked, 0.1s Time] [2022-01-28 14:59:47,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2022-01-28 14:59:47,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2044. [2022-01-28 14:59:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 2043 states have (on average 3.4023494860499266) internal successors, (6951), 2043 states have internal predecessors, (6951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:47,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 6951 transitions. [2022-01-28 14:59:47,276 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 6951 transitions. Word has length 24 [2022-01-28 14:59:47,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:47,276 INFO L470 AbstractCegarLoop]: Abstraction has 2044 states and 6951 transitions. [2022-01-28 14:59:47,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:47,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 6951 transitions. [2022-01-28 14:59:47,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:47,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:47,279 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:47,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:47,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:47,479 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:47,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:47,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2140864173, now seen corresponding path program 313 times [2022-01-28 14:59:47,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:47,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175482532] [2022-01-28 14:59:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:47,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:47,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:47,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175482532] [2022-01-28 14:59:47,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175482532] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:47,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928592954] [2022-01-28 14:59:47,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:59:47,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:47,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:47,757 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:47,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-01-28 14:59:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:47,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:59:47,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:47,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:47,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:48,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:48,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:59:48,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 14:59:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:48,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:48,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:48,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:59:48,887 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:48,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 50 [2022-01-28 14:59:48,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-01-28 14:59:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:48,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928592954] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:48,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:48,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:59:48,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341712819] [2022-01-28 14:59:48,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:48,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:59:48,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:48,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:59:48,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:48,919 INFO L87 Difference]: Start difference. First operand 2044 states and 6951 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:49,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:49,364 INFO L93 Difference]: Finished difference Result 2499 states and 8357 transitions. [2022-01-28 14:59:49,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:59:49,364 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:49,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:49,369 INFO L225 Difference]: With dead ends: 2499 [2022-01-28 14:59:49,369 INFO L226 Difference]: Without dead ends: 2409 [2022-01-28 14:59:49,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:59:49,369 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 96 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:49,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 298 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 632 Invalid, 0 Unknown, 58 Unchecked, 0.3s Time] [2022-01-28 14:59:49,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2022-01-28 14:59:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 2028. [2022-01-28 14:59:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 3.4055254070054266) internal successors, (6903), 2027 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 6903 transitions. [2022-01-28 14:59:49,394 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 6903 transitions. Word has length 24 [2022-01-28 14:59:49,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:49,394 INFO L470 AbstractCegarLoop]: Abstraction has 2028 states and 6903 transitions. [2022-01-28 14:59:49,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:49,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 6903 transitions. [2022-01-28 14:59:49,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:49,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:49,397 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:49,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:49,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:49,597 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:49,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:49,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1937354835, now seen corresponding path program 314 times [2022-01-28 14:59:49,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:49,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204269495] [2022-01-28 14:59:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:49,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:59:49,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:49,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204269495] [2022-01-28 14:59:49,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204269495] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:49,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356569417] [2022-01-28 14:59:49,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:59:49,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:49,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:49,862 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:49,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-01-28 14:59:49,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:59:49,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:49,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:59:49,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:49,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:49,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:50,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:50,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:59:50,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 14:59:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:59:50,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:50,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:50,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 99 [2022-01-28 14:59:50,878 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:50,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-01-28 14:59:50,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2022-01-28 14:59:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:59:50,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356569417] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:50,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:50,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:59:50,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046933976] [2022-01-28 14:59:50,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:50,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:59:50,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:50,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:59:50,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:50,894 INFO L87 Difference]: Start difference. First operand 2028 states and 6903 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:51,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:51,462 INFO L93 Difference]: Finished difference Result 2258 states and 7712 transitions. [2022-01-28 14:59:51,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:59:51,462 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:51,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:51,466 INFO L225 Difference]: With dead ends: 2258 [2022-01-28 14:59:51,466 INFO L226 Difference]: Without dead ends: 2239 [2022-01-28 14:59:51,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 14:59:51,466 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 96 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:51,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 210 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 364 Invalid, 0 Unknown, 469 Unchecked, 0.1s Time] [2022-01-28 14:59:51,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2022-01-28 14:59:51,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 2024. [2022-01-28 14:59:51,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 3.40731586752348) internal successors, (6893), 2023 states have internal predecessors, (6893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:51,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 6893 transitions. [2022-01-28 14:59:51,491 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 6893 transitions. Word has length 24 [2022-01-28 14:59:51,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:51,491 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 6893 transitions. [2022-01-28 14:59:51,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:51,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 6893 transitions. [2022-01-28 14:59:51,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:51,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:51,494 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:51,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Ended with exit code 0 [2022-01-28 14:59:51,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2022-01-28 14:59:51,694 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:51,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:51,694 INFO L85 PathProgramCache]: Analyzing trace with hash 114698045, now seen corresponding path program 315 times [2022-01-28 14:59:51,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:51,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750402722] [2022-01-28 14:59:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:51,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:51,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:51,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:51,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750402722] [2022-01-28 14:59:51,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750402722] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:51,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199021238] [2022-01-28 14:59:51,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:59:51,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:51,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:51,961 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:51,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-01-28 14:59:51,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:59:51,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:51,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:59:51,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:52,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:52,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:52,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:52,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:59:52,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-28 14:59:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:52,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:52,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:52,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:59:53,143 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:53,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 50 [2022-01-28 14:59:53,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-01-28 14:59:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:53,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199021238] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:53,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:53,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:59:53,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099434117] [2022-01-28 14:59:53,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:53,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:59:53,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:53,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:59:53,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:53,168 INFO L87 Difference]: Start difference. First operand 2024 states and 6893 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:53,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:53,864 INFO L93 Difference]: Finished difference Result 2426 states and 8126 transitions. [2022-01-28 14:59:53,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:59:53,865 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:53,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:53,878 INFO L225 Difference]: With dead ends: 2426 [2022-01-28 14:59:53,878 INFO L226 Difference]: Without dead ends: 2344 [2022-01-28 14:59:53,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 14:59:53,878 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 100 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 355 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:53,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 332 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 612 Invalid, 0 Unknown, 355 Unchecked, 0.3s Time] [2022-01-28 14:59:53,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2022-01-28 14:59:53,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2026. [2022-01-28 14:59:53,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 3.4074074074074074) internal successors, (6900), 2025 states have internal predecessors, (6900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 6900 transitions. [2022-01-28 14:59:53,903 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 6900 transitions. Word has length 24 [2022-01-28 14:59:53,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:53,903 INFO L470 AbstractCegarLoop]: Abstraction has 2026 states and 6900 transitions. [2022-01-28 14:59:53,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:53,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 6900 transitions. [2022-01-28 14:59:53,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:53,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:53,906 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:53,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Ended with exit code 0 [2022-01-28 14:59:54,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:54,106 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:54,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:54,107 INFO L85 PathProgramCache]: Analyzing trace with hash -733924427, now seen corresponding path program 316 times [2022-01-28 14:59:54,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:54,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001655649] [2022-01-28 14:59:54,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:54,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:54,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:54,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001655649] [2022-01-28 14:59:54,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001655649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:54,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264053186] [2022-01-28 14:59:54,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:59:54,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:54,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:54,350 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:54,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-01-28 14:59:54,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:59:54,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:54,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 14:59:54,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:54,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:54,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:54,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:54,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 14:59:54,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 14:59:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:54,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:55,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:55,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 14:59:55,629 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:55,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 57 [2022-01-28 14:59:55,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2022-01-28 14:59:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:55,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264053186] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:55,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:55,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:59:55,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049782907] [2022-01-28 14:59:55,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:55,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:59:55,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:55,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:59:55,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:55,658 INFO L87 Difference]: Start difference. First operand 2026 states and 6900 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:55,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:55,920 INFO L93 Difference]: Finished difference Result 2413 states and 8202 transitions. [2022-01-28 14:59:55,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:59:55,920 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:55,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:55,924 INFO L225 Difference]: With dead ends: 2413 [2022-01-28 14:59:55,925 INFO L226 Difference]: Without dead ends: 2374 [2022-01-28 14:59:55,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:55,925 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:55,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 395 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 620 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-01-28 14:59:55,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2022-01-28 14:59:55,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 2024. [2022-01-28 14:59:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 3.40731586752348) internal successors, (6893), 2023 states have internal predecessors, (6893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:55,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 6893 transitions. [2022-01-28 14:59:55,949 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 6893 transitions. Word has length 24 [2022-01-28 14:59:55,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:55,949 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 6893 transitions. [2022-01-28 14:59:55,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:55,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 6893 transitions. [2022-01-28 14:59:55,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:55,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:55,951 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:55,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:56,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:56,152 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:56,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:56,152 INFO L85 PathProgramCache]: Analyzing trace with hash 423248889, now seen corresponding path program 317 times [2022-01-28 14:59:56,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:56,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610367637] [2022-01-28 14:59:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:56,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:56,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:56,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610367637] [2022-01-28 14:59:56,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610367637] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:56,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640170632] [2022-01-28 14:59:56,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:59:56,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:56,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:56,413 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:56,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-01-28 14:59:56,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:59:56,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:56,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:59:56,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:56,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:56,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:56,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:56,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:59:56,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:59:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:56,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:57,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:57,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 14:59:57,606 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:57,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 84 [2022-01-28 14:59:57,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 57 [2022-01-28 14:59:57,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 14:59:57,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640170632] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:57,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:57,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:59:57,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270837676] [2022-01-28 14:59:57,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:57,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:59:57,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:57,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:59:57,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:57,642 INFO L87 Difference]: Start difference. First operand 2024 states and 6893 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:58,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:58,344 INFO L93 Difference]: Finished difference Result 2519 states and 8430 transitions. [2022-01-28 14:59:58,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:59:58,345 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:59:58,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:58,349 INFO L225 Difference]: With dead ends: 2519 [2022-01-28 14:59:58,349 INFO L226 Difference]: Without dead ends: 2445 [2022-01-28 14:59:58,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:59:58,349 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 125 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:58,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 254 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 553 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-01-28 14:59:58,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2022-01-28 14:59:58,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2024. [2022-01-28 14:59:58,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 3.40731586752348) internal successors, (6893), 2023 states have internal predecessors, (6893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:58,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 6893 transitions. [2022-01-28 14:59:58,374 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 6893 transitions. Word has length 24 [2022-01-28 14:59:58,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:58,375 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 6893 transitions. [2022-01-28 14:59:58,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:58,375 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 6893 transitions. [2022-01-28 14:59:58,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:59:58,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:58,377 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:58,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2022-01-28 14:59:58,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:58,578 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:58,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:58,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1844543555, now seen corresponding path program 318 times [2022-01-28 14:59:58,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:58,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634456742] [2022-01-28 14:59:58,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:58,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:59:58,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:58,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634456742] [2022-01-28 14:59:58,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634456742] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:58,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128355081] [2022-01-28 14:59:58,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:59:58,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:58,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:58,797 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 14:59:58,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-01-28 14:59:58,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:59:58,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:58,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:59:58,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:58,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:58,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:58,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:58,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 14:59:58,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 14:59:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:59:59,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:59,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:59,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 99 [2022-01-28 14:59:59,815 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:59:59,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-01-28 14:59:59,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2022-01-28 14:59:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:59:59,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128355081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:59,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:59,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 14:59:59,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825005231] [2022-01-28 14:59:59,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:59,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:59:59,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:59,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:59:59,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:59,832 INFO L87 Difference]: Start difference. First operand 2024 states and 6893 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:00,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:00,703 INFO L93 Difference]: Finished difference Result 2407 states and 8142 transitions. [2022-01-28 15:00:00,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:00:00,703 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:00,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:00,707 INFO L225 Difference]: With dead ends: 2407 [2022-01-28 15:00:00,707 INFO L226 Difference]: Without dead ends: 2357 [2022-01-28 15:00:00,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 15:00:00,707 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 110 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:00,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 287 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 713 Invalid, 0 Unknown, 319 Unchecked, 0.3s Time] [2022-01-28 15:00:00,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2022-01-28 15:00:00,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2039. [2022-01-28 15:00:00,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 3.4131501472031402) internal successors, (6956), 2038 states have internal predecessors, (6956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:00,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 6956 transitions. [2022-01-28 15:00:00,732 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 6956 transitions. Word has length 24 [2022-01-28 15:00:00,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:00,732 INFO L470 AbstractCegarLoop]: Abstraction has 2039 states and 6956 transitions. [2022-01-28 15:00:00,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:00,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 6956 transitions. [2022-01-28 15:00:00,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:00,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:00,735 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:00,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Ended with exit code 0 [2022-01-28 15:00:00,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-01-28 15:00:00,935 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:00,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:00,936 INFO L85 PathProgramCache]: Analyzing trace with hash -445275791, now seen corresponding path program 319 times [2022-01-28 15:00:00,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:00,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627225609] [2022-01-28 15:00:00,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:00,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:01,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:01,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:01,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627225609] [2022-01-28 15:00:01,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627225609] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:01,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46235384] [2022-01-28 15:00:01,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:00:01,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:01,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:01,159 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:01,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-01-28 15:00:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:01,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:00:01,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:01,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:01,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:01,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:01,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 15:00:01,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-28 15:00:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:01,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:02,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:02,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 15:00:02,414 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 15:00:02,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 57 [2022-01-28 15:00:02,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2022-01-28 15:00:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:02,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46235384] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:02,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:02,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 15:00:02,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796396215] [2022-01-28 15:00:02,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:02,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:00:02,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:02,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:00:02,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:00:02,445 INFO L87 Difference]: Start difference. First operand 2039 states and 6956 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:02,675 INFO L93 Difference]: Finished difference Result 2330 states and 7930 transitions. [2022-01-28 15:00:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:00:02,676 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:02,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:02,680 INFO L225 Difference]: With dead ends: 2330 [2022-01-28 15:00:02,680 INFO L226 Difference]: Without dead ends: 2291 [2022-01-28 15:00:02,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:00:02,680 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:02,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 324 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 515 Invalid, 0 Unknown, 242 Unchecked, 0.2s Time] [2022-01-28 15:00:02,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-01-28 15:00:02,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2039. [2022-01-28 15:00:02,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 3.4131501472031402) internal successors, (6956), 2038 states have internal predecessors, (6956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:02,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 6956 transitions. [2022-01-28 15:00:02,707 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 6956 transitions. Word has length 24 [2022-01-28 15:00:02,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:02,707 INFO L470 AbstractCegarLoop]: Abstraction has 2039 states and 6956 transitions. [2022-01-28 15:00:02,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:02,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 6956 transitions. [2022-01-28 15:00:02,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:02,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:02,710 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:02,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Ended with exit code 0 [2022-01-28 15:00:02,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2022-01-28 15:00:02,910 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:02,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:02,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1543701195, now seen corresponding path program 320 times [2022-01-28 15:00:02,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:02,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270280423] [2022-01-28 15:00:02,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:02,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:03,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:03,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270280423] [2022-01-28 15:00:03,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270280423] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:03,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521665990] [2022-01-28 15:00:03,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:00:03,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:03,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:03,147 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:03,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-01-28 15:00:03,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:03,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:03,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:00:03,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:03,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:03,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:03,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:03,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 15:00:03,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 15:00:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:03,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:03,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:03,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 99 [2022-01-28 15:00:04,174 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 15:00:04,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-01-28 15:00:04,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2022-01-28 15:00:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:04,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521665990] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:04,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:04,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-28 15:00:04,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539950726] [2022-01-28 15:00:04,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:04,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:00:04,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:04,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:00:04,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:00:04,192 INFO L87 Difference]: Start difference. First operand 2039 states and 6956 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:04,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:04,811 INFO L93 Difference]: Finished difference Result 2496 states and 8397 transitions. [2022-01-28 15:00:04,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 15:00:04,811 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:04,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:04,815 INFO L225 Difference]: With dead ends: 2496 [2022-01-28 15:00:04,816 INFO L226 Difference]: Without dead ends: 2422 [2022-01-28 15:00:04,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 15:00:04,816 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 82 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:04,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 334 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 646 Invalid, 0 Unknown, 138 Unchecked, 0.3s Time] [2022-01-28 15:00:04,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2022-01-28 15:00:04,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2039. [2022-01-28 15:00:04,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 3.4131501472031402) internal successors, (6956), 2038 states have internal predecessors, (6956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:04,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 6956 transitions. [2022-01-28 15:00:04,843 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 6956 transitions. Word has length 24 [2022-01-28 15:00:04,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:04,844 INFO L470 AbstractCegarLoop]: Abstraction has 2039 states and 6956 transitions. [2022-01-28 15:00:04,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:04,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 6956 transitions. [2022-01-28 15:00:04,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:04,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:04,846 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:04,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Ended with exit code 0 [2022-01-28 15:00:05,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2022-01-28 15:00:05,047 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:05,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:05,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1326952907, now seen corresponding path program 321 times [2022-01-28 15:00:05,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:05,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575158852] [2022-01-28 15:00:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:05,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 15:00:05,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:05,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575158852] [2022-01-28 15:00:05,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575158852] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:05,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274422280] [2022-01-28 15:00:05,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:00:05,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:05,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:05,250 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:05,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-01-28 15:00:05,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:00:05,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:05,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:00:05,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:05,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:05,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:05,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:05,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 15:00:05,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 15:00:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 15:00:05,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:06,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:06,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 15:00:06,480 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 15:00:06,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 50 [2022-01-28 15:00:06,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-01-28 15:00:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 15:00:06,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274422280] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:06,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:06,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-28 15:00:06,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020242510] [2022-01-28 15:00:06,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:06,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:00:06,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:06,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:00:06,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:00:06,511 INFO L87 Difference]: Start difference. First operand 2039 states and 6956 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:06,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:06,696 INFO L93 Difference]: Finished difference Result 2452 states and 8303 transitions. [2022-01-28 15:00:06,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:00:06,697 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:06,701 INFO L225 Difference]: With dead ends: 2452 [2022-01-28 15:00:06,701 INFO L226 Difference]: Without dead ends: 2387 [2022-01-28 15:00:06,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:00:06,702 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 50 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:06,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 189 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 382 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-01-28 15:00:06,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2022-01-28 15:00:06,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 2043. [2022-01-28 15:00:06,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 2042 states have (on average 3.4103819784524974) internal successors, (6964), 2042 states have internal predecessors, (6964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:06,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 6964 transitions. [2022-01-28 15:00:06,729 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 6964 transitions. Word has length 24 [2022-01-28 15:00:06,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:06,729 INFO L470 AbstractCegarLoop]: Abstraction has 2043 states and 6964 transitions. [2022-01-28 15:00:06,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:06,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 6964 transitions. [2022-01-28 15:00:06,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:06,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:06,732 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:06,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Ended with exit code 0 [2022-01-28 15:00:06,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2022-01-28 15:00:06,932 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:06,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:06,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1374672095, now seen corresponding path program 322 times [2022-01-28 15:00:06,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:06,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891429592] [2022-01-28 15:00:06,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:06,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:07,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:07,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891429592] [2022-01-28 15:00:07,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891429592] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:07,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317861029] [2022-01-28 15:00:07,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:00:07,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:07,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:07,096 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:07,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-01-28 15:00:07,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:00:07,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:07,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:00:07,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:07,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-01-28 15:00:07,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 15:00:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:07,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:07,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:07,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-01-28 15:00:07,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:07,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 99 [2022-01-28 15:00:07,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:07,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 75 [2022-01-28 15:00:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:07,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317861029] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:07,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:07,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-01-28 15:00:07,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918575237] [2022-01-28 15:00:07,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:07,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:00:07,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:07,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:00:07,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:00:07,989 INFO L87 Difference]: Start difference. First operand 2043 states and 6964 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:08,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:08,476 INFO L93 Difference]: Finished difference Result 2311 states and 7738 transitions. [2022-01-28 15:00:08,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:00:08,477 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:08,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:08,481 INFO L225 Difference]: With dead ends: 2311 [2022-01-28 15:00:08,481 INFO L226 Difference]: Without dead ends: 2280 [2022-01-28 15:00:08,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:00:08,482 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 119 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:08,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 230 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:00:08,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2022-01-28 15:00:08,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 2044. [2022-01-28 15:00:08,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 2043 states have (on average 3.41067058247675) internal successors, (6968), 2043 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 6968 transitions. [2022-01-28 15:00:08,508 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 6968 transitions. Word has length 24 [2022-01-28 15:00:08,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:08,508 INFO L470 AbstractCegarLoop]: Abstraction has 2044 states and 6968 transitions. [2022-01-28 15:00:08,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:08,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 6968 transitions. [2022-01-28 15:00:08,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:08,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:08,511 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:08,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-01-28 15:00:08,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:08,711 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:08,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:08,711 INFO L85 PathProgramCache]: Analyzing trace with hash 818034983, now seen corresponding path program 323 times [2022-01-28 15:00:08,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:08,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510730382] [2022-01-28 15:00:08,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:08,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:08,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:08,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510730382] [2022-01-28 15:00:08,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510730382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:08,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135377131] [2022-01-28 15:00:08,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:00:08,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:08,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:08,871 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:08,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-01-28 15:00:08,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:00:08,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:08,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:00:08,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:08,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:08,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 15:00:09,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:09,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:09,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 15:00:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:09,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:09,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:09,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-28 15:00:09,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:09,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 55 [2022-01-28 15:00:09,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:09,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2022-01-28 15:00:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:09,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135377131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:09,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:09,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-01-28 15:00:09,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649800884] [2022-01-28 15:00:09,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:09,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 15:00:09,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:09,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 15:00:09,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:00:09,757 INFO L87 Difference]: Start difference. First operand 2044 states and 6968 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:10,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:10,152 INFO L93 Difference]: Finished difference Result 2203 states and 7409 transitions. [2022-01-28 15:00:10,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:00:10,152 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:10,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:10,156 INFO L225 Difference]: With dead ends: 2203 [2022-01-28 15:00:10,156 INFO L226 Difference]: Without dead ends: 2144 [2022-01-28 15:00:10,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:00:10,157 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 109 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:10,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 207 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 511 Invalid, 0 Unknown, 177 Unchecked, 0.2s Time] [2022-01-28 15:00:10,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2022-01-28 15:00:10,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 2048. [2022-01-28 15:00:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 3.4088910600879334) internal successors, (6978), 2047 states have internal predecessors, (6978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 6978 transitions. [2022-01-28 15:00:10,182 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 6978 transitions. Word has length 24 [2022-01-28 15:00:10,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:10,182 INFO L470 AbstractCegarLoop]: Abstraction has 2048 states and 6978 transitions. [2022-01-28 15:00:10,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:10,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 6978 transitions. [2022-01-28 15:00:10,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:10,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:10,185 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:10,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:10,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:10,386 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:10,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:10,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1981968157, now seen corresponding path program 324 times [2022-01-28 15:00:10,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:10,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026099234] [2022-01-28 15:00:10,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:10,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:10,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:10,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026099234] [2022-01-28 15:00:10,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026099234] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:10,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31343364] [2022-01-28 15:00:10,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:00:10,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:10,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:10,548 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:10,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-01-28 15:00:10,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:00:10,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:10,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:00:10,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:10,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:10,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-28 15:00:10,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:10,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 15:00:10,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 15:00:10,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:00:10,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:10,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:11,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:11,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-01-28 15:00:11,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:11,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 96 [2022-01-28 15:00:11,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:11,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 72 [2022-01-28 15:00:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:11,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31343364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:11,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:11,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:00:11,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079528231] [2022-01-28 15:00:11,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:11,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:00:11,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:11,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:00:11,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:11,475 INFO L87 Difference]: Start difference. First operand 2048 states and 6978 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:12,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:12,015 INFO L93 Difference]: Finished difference Result 2377 states and 7939 transitions. [2022-01-28 15:00:12,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:00:12,015 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:12,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:12,019 INFO L225 Difference]: With dead ends: 2377 [2022-01-28 15:00:12,019 INFO L226 Difference]: Without dead ends: 2342 [2022-01-28 15:00:12,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:00:12,020 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 100 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:12,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 274 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 827 Invalid, 0 Unknown, 134 Unchecked, 0.3s Time] [2022-01-28 15:00:12,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2022-01-28 15:00:12,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 2048. [2022-01-28 15:00:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 3.4088910600879334) internal successors, (6978), 2047 states have internal predecessors, (6978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:12,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 6978 transitions. [2022-01-28 15:00:12,045 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 6978 transitions. Word has length 24 [2022-01-28 15:00:12,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:12,045 INFO L470 AbstractCegarLoop]: Abstraction has 2048 states and 6978 transitions. [2022-01-28 15:00:12,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:12,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 6978 transitions. [2022-01-28 15:00:12,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:12,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:12,048 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:12,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:12,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:12,248 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:12,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:12,248 INFO L85 PathProgramCache]: Analyzing trace with hash -941255679, now seen corresponding path program 325 times [2022-01-28 15:00:12,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:12,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225225519] [2022-01-28 15:00:12,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:12,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:12,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:12,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225225519] [2022-01-28 15:00:12,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225225519] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:12,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605405002] [2022-01-28 15:00:12,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:00:12,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:12,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:12,409 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:12,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-01-28 15:00:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:12,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:00:12,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:12,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:12,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-28 15:00:12,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:12,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:12,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:00:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:12,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:13,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:13,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2022-01-28 15:00:13,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:13,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 96 [2022-01-28 15:00:13,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:13,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 72 [2022-01-28 15:00:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:13,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605405002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:13,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:13,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:00:13,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871173254] [2022-01-28 15:00:13,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:13,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:00:13,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:13,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:00:13,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:13,386 INFO L87 Difference]: Start difference. First operand 2048 states and 6978 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:13,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:13,798 INFO L93 Difference]: Finished difference Result 2193 states and 7392 transitions. [2022-01-28 15:00:13,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:00:13,798 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:13,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:13,810 INFO L225 Difference]: With dead ends: 2193 [2022-01-28 15:00:13,810 INFO L226 Difference]: Without dead ends: 2162 [2022-01-28 15:00:13,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:00:13,810 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:13,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 233 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 807 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-01-28 15:00:13,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2022-01-28 15:00:13,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 2049. [2022-01-28 15:00:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.4091796875) internal successors, (6982), 2048 states have internal predecessors, (6982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6982 transitions. [2022-01-28 15:00:13,832 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6982 transitions. Word has length 24 [2022-01-28 15:00:13,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:13,832 INFO L470 AbstractCegarLoop]: Abstraction has 2049 states and 6982 transitions. [2022-01-28 15:00:13,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:13,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6982 transitions. [2022-01-28 15:00:13,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:13,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:13,835 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:13,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Ended with exit code 0 [2022-01-28 15:00:14,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:14,035 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:14,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:14,036 INFO L85 PathProgramCache]: Analyzing trace with hash 222677495, now seen corresponding path program 326 times [2022-01-28 15:00:14,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:14,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550615655] [2022-01-28 15:00:14,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:14,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:14,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:14,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550615655] [2022-01-28 15:00:14,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550615655] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:14,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499159286] [2022-01-28 15:00:14,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:00:14,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:14,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:14,203 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:14,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-01-28 15:00:14,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:14,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:14,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:00:14,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:14,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:14,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 15:00:14,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:14,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 15:00:14,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 15:00:14,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:00:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:14,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:14,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:14,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 51 [2022-01-28 15:00:15,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:15,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 55 [2022-01-28 15:00:15,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:15,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2022-01-28 15:00:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:15,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499159286] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:15,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:15,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:00:15,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100592071] [2022-01-28 15:00:15,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:15,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:00:15,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:15,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:00:15,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:15,216 INFO L87 Difference]: Start difference. First operand 2049 states and 6982 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:15,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:15,837 INFO L93 Difference]: Finished difference Result 2265 states and 7528 transitions. [2022-01-28 15:00:15,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:00:15,837 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:15,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:15,841 INFO L225 Difference]: With dead ends: 2265 [2022-01-28 15:00:15,841 INFO L226 Difference]: Without dead ends: 2185 [2022-01-28 15:00:15,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 15:00:15,842 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 94 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:15,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 273 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 849 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-01-28 15:00:15,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2022-01-28 15:00:15,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 2053. [2022-01-28 15:00:15,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 3.4074074074074074) internal successors, (6992), 2052 states have internal predecessors, (6992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:15,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 6992 transitions. [2022-01-28 15:00:15,866 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 6992 transitions. Word has length 24 [2022-01-28 15:00:15,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:15,866 INFO L470 AbstractCegarLoop]: Abstraction has 2053 states and 6992 transitions. [2022-01-28 15:00:15,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:15,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 6992 transitions. [2022-01-28 15:00:15,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:15,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:15,869 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:15,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Ended with exit code 0 [2022-01-28 15:00:16,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:16,069 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:16,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:16,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1698295073, now seen corresponding path program 327 times [2022-01-28 15:00:16,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:16,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655757107] [2022-01-28 15:00:16,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:16,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:16,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:16,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655757107] [2022-01-28 15:00:16,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655757107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:16,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472541943] [2022-01-28 15:00:16,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:00:16,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:16,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:16,223 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:16,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-01-28 15:00:16,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:00:16,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:16,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:00:16,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:16,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 15:00:16,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:16,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 15:00:16,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:16,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 15:00:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:16,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:16,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:16,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 84 [2022-01-28 15:00:17,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:17,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2022-01-28 15:00:17,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:17,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2022-01-28 15:00:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:17,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472541943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:17,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:17,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:00:17,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410212710] [2022-01-28 15:00:17,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:17,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:00:17,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:17,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:00:17,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:17,311 INFO L87 Difference]: Start difference. First operand 2053 states and 6992 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:18,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:18,191 INFO L93 Difference]: Finished difference Result 2321 states and 7699 transitions. [2022-01-28 15:00:18,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 15:00:18,192 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:18,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:18,196 INFO L225 Difference]: With dead ends: 2321 [2022-01-28 15:00:18,196 INFO L226 Difference]: Without dead ends: 2237 [2022-01-28 15:00:18,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 15:00:18,196 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 105 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:18,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 300 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:00:18,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2022-01-28 15:00:18,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2056. [2022-01-28 15:00:18,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 2055 states have (on average 3.4068126520681266) internal successors, (7001), 2055 states have internal predecessors, (7001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:18,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 7001 transitions. [2022-01-28 15:00:18,221 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 7001 transitions. Word has length 24 [2022-01-28 15:00:18,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:18,221 INFO L470 AbstractCegarLoop]: Abstraction has 2056 states and 7001 transitions. [2022-01-28 15:00:18,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:18,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 7001 transitions. [2022-01-28 15:00:18,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:18,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:18,224 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:18,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Ended with exit code 0 [2022-01-28 15:00:18,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2022-01-28 15:00:18,424 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:18,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:18,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1210054435, now seen corresponding path program 328 times [2022-01-28 15:00:18,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:18,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821780582] [2022-01-28 15:00:18,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:18,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:18,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:18,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:18,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821780582] [2022-01-28 15:00:18,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821780582] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:18,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49370031] [2022-01-28 15:00:18,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:00:18,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:18,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:18,578 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:18,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-01-28 15:00:18,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:00:18,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:18,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:00:18,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:18,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:18,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 15:00:18,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 15:00:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:18,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:19,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:19,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 71 [2022-01-28 15:00:19,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:19,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 99 [2022-01-28 15:00:19,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:19,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 75 [2022-01-28 15:00:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:19,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49370031] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:19,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:19,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-01-28 15:00:19,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202744520] [2022-01-28 15:00:19,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:19,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:00:19,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:19,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:00:19,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:19,540 INFO L87 Difference]: Start difference. First operand 2056 states and 7001 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:19,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:19,969 INFO L93 Difference]: Finished difference Result 2457 states and 8102 transitions. [2022-01-28 15:00:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:00:19,969 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:19,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:19,974 INFO L225 Difference]: With dead ends: 2457 [2022-01-28 15:00:19,974 INFO L226 Difference]: Without dead ends: 2426 [2022-01-28 15:00:19,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:00:19,974 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 102 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:19,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 357 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 847 Invalid, 0 Unknown, 216 Unchecked, 0.3s Time] [2022-01-28 15:00:19,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2022-01-28 15:00:19,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 2057. [2022-01-28 15:00:19,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 3.407101167315175) internal successors, (7005), 2056 states have internal predecessors, (7005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:20,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 7005 transitions. [2022-01-28 15:00:20,003 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 7005 transitions. Word has length 24 [2022-01-28 15:00:20,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:20,003 INFO L470 AbstractCegarLoop]: Abstraction has 2057 states and 7005 transitions. [2022-01-28 15:00:20,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:20,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 7005 transitions. [2022-01-28 15:00:20,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:20,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:20,006 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:20,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:20,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2022-01-28 15:00:20,207 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:20,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:20,207 INFO L85 PathProgramCache]: Analyzing trace with hash 982652643, now seen corresponding path program 329 times [2022-01-28 15:00:20,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:20,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750715076] [2022-01-28 15:00:20,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:20,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:20,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:20,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750715076] [2022-01-28 15:00:20,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750715076] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:20,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51581077] [2022-01-28 15:00:20,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:00:20,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:20,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:20,384 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:20,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-01-28 15:00:20,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:00:20,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:20,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:00:20,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:20,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:20,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 15:00:20,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:20,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:20,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 15:00:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:20,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:21,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:21,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 49 [2022-01-28 15:00:21,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:21,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 55 [2022-01-28 15:00:21,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:21,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2022-01-28 15:00:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:21,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51581077] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:21,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:21,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:00:21,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763886328] [2022-01-28 15:00:21,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:21,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:00:21,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:21,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:00:21,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:21,337 INFO L87 Difference]: Start difference. First operand 2057 states and 7005 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:21,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:21,749 INFO L93 Difference]: Finished difference Result 2232 states and 7501 transitions. [2022-01-28 15:00:21,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:00:21,749 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:21,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:21,753 INFO L225 Difference]: With dead ends: 2232 [2022-01-28 15:00:21,753 INFO L226 Difference]: Without dead ends: 2201 [2022-01-28 15:00:21,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:00:21,753 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 88 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:21,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 258 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 490 Invalid, 0 Unknown, 208 Unchecked, 0.2s Time] [2022-01-28 15:00:21,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2022-01-28 15:00:21,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 2057. [2022-01-28 15:00:21,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 3.407101167315175) internal successors, (7005), 2056 states have internal predecessors, (7005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:21,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 7005 transitions. [2022-01-28 15:00:21,777 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 7005 transitions. Word has length 24 [2022-01-28 15:00:21,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:21,777 INFO L470 AbstractCegarLoop]: Abstraction has 2057 states and 7005 transitions. [2022-01-28 15:00:21,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:21,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 7005 transitions. [2022-01-28 15:00:21,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:21,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:21,780 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:21,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:21,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-01-28 15:00:21,980 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:21,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:21,980 INFO L85 PathProgramCache]: Analyzing trace with hash 2146585817, now seen corresponding path program 330 times [2022-01-28 15:00:21,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:21,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734697525] [2022-01-28 15:00:21,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:21,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:22,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:22,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734697525] [2022-01-28 15:00:22,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734697525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:22,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123758593] [2022-01-28 15:00:22,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:00:22,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:22,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:22,158 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:22,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-01-28 15:00:22,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:00:22,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:22,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:00:22,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:22,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:22,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 15:00:22,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:22,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 15:00:22,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 15:00:22,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:00:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:22,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:23,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:23,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 47 [2022-01-28 15:00:23,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:23,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-01-28 15:00:23,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:23,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 54 [2022-01-28 15:00:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:23,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123758593] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:23,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:23,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:00:23,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575070324] [2022-01-28 15:00:23,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:23,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:00:23,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:23,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:00:23,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:23,208 INFO L87 Difference]: Start difference. First operand 2057 states and 7005 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:24,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:24,308 INFO L93 Difference]: Finished difference Result 2767 states and 8803 transitions. [2022-01-28 15:00:24,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 15:00:24,309 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:24,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:24,313 INFO L225 Difference]: With dead ends: 2767 [2022-01-28 15:00:24,313 INFO L226 Difference]: Without dead ends: 2625 [2022-01-28 15:00:24,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 15:00:24,313 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 172 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:24,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 564 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1239 Invalid, 0 Unknown, 73 Unchecked, 0.5s Time] [2022-01-28 15:00:24,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2022-01-28 15:00:24,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2062. [2022-01-28 15:00:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 3.40562833575934) internal successors, (7019), 2061 states have internal predecessors, (7019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 7019 transitions. [2022-01-28 15:00:24,343 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 7019 transitions. Word has length 24 [2022-01-28 15:00:24,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:24,343 INFO L470 AbstractCegarLoop]: Abstraction has 2062 states and 7019 transitions. [2022-01-28 15:00:24,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:24,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 7019 transitions. [2022-01-28 15:00:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:24,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:24,345 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:24,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Ended with exit code 0 [2022-01-28 15:00:24,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-01-28 15:00:24,546 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:24,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:24,546 INFO L85 PathProgramCache]: Analyzing trace with hash -234912863, now seen corresponding path program 331 times [2022-01-28 15:00:24,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:24,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057264256] [2022-01-28 15:00:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:24,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:24,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:24,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057264256] [2022-01-28 15:00:24,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057264256] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:24,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826573750] [2022-01-28 15:00:24,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:00:24,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:24,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:24,703 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:24,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-01-28 15:00:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:24,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:00:24,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:24,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:24,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 15:00:24,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-01-28 15:00:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:24,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:25,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:25,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 71 [2022-01-28 15:00:25,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:25,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2022-01-28 15:00:25,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:25,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2022-01-28 15:00:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:25,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826573750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:25,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:25,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-01-28 15:00:25,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748370989] [2022-01-28 15:00:25,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:25,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:00:25,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:25,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:00:25,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:25,620 INFO L87 Difference]: Start difference. First operand 2062 states and 7019 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:25,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:25,933 INFO L93 Difference]: Finished difference Result 2452 states and 8091 transitions. [2022-01-28 15:00:25,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:00:25,933 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:25,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:25,937 INFO L225 Difference]: With dead ends: 2452 [2022-01-28 15:00:25,937 INFO L226 Difference]: Without dead ends: 2421 [2022-01-28 15:00:25,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:25,937 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 126 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:25,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 277 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 631 Invalid, 0 Unknown, 138 Unchecked, 0.3s Time] [2022-01-28 15:00:25,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2022-01-28 15:00:25,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 2062. [2022-01-28 15:00:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 3.40562833575934) internal successors, (7019), 2061 states have internal predecessors, (7019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:25,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 7019 transitions. [2022-01-28 15:00:25,971 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 7019 transitions. Word has length 24 [2022-01-28 15:00:25,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:25,971 INFO L470 AbstractCegarLoop]: Abstraction has 2062 states and 7019 transitions. [2022-01-28 15:00:25,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:25,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 7019 transitions. [2022-01-28 15:00:25,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:25,974 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:25,974 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:25,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:26,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:26,174 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:26,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:26,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1142534045, now seen corresponding path program 332 times [2022-01-28 15:00:26,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:26,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177578417] [2022-01-28 15:00:26,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:26,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:26,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:26,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177578417] [2022-01-28 15:00:26,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177578417] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:26,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305451085] [2022-01-28 15:00:26,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:00:26,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:26,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:26,309 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:26,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-01-28 15:00:26,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:26,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:26,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:00:26,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:26,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:26,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 15:00:26,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:26,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 15:00:26,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-28 15:00:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:26,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:27,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:27,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 47 [2022-01-28 15:00:27,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:27,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-01-28 15:00:27,272 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:27,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 54 [2022-01-28 15:00:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:27,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305451085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:27,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:27,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:00:27,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35380429] [2022-01-28 15:00:27,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:27,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:00:27,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:27,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:00:27,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:27,343 INFO L87 Difference]: Start difference. First operand 2062 states and 7019 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:27,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:27,658 INFO L93 Difference]: Finished difference Result 2593 states and 8518 transitions. [2022-01-28 15:00:27,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 15:00:27,658 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:27,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:27,662 INFO L225 Difference]: With dead ends: 2593 [2022-01-28 15:00:27,662 INFO L226 Difference]: Without dead ends: 2515 [2022-01-28 15:00:27,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:00:27,662 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 96 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:27,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 343 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 581 Invalid, 0 Unknown, 170 Unchecked, 0.2s Time] [2022-01-28 15:00:27,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2022-01-28 15:00:27,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2111. [2022-01-28 15:00:27,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2110 states have (on average 3.4) internal successors, (7174), 2110 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 7174 transitions. [2022-01-28 15:00:27,689 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 7174 transitions. Word has length 24 [2022-01-28 15:00:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:27,690 INFO L470 AbstractCegarLoop]: Abstraction has 2111 states and 7174 transitions. [2022-01-28 15:00:27,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:27,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 7174 transitions. [2022-01-28 15:00:27,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:27,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:27,692 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:27,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:27,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:27,893 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:27,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:27,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1073139423, now seen corresponding path program 333 times [2022-01-28 15:00:27,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:27,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562131992] [2022-01-28 15:00:27,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:27,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:28,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:28,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562131992] [2022-01-28 15:00:28,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562131992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:28,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321214262] [2022-01-28 15:00:28,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:00:28,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:28,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:28,086 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:28,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-01-28 15:00:28,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:00:28,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:28,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:00:28,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:28,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:28,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 15:00:28,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:28,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:28,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 15:00:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:28,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:29,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:29,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 71 [2022-01-28 15:00:29,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:29,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 99 [2022-01-28 15:00:29,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:29,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 75 [2022-01-28 15:00:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:29,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321214262] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:29,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:29,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:00:29,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986722927] [2022-01-28 15:00:29,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:29,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:00:29,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:29,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:00:29,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:29,313 INFO L87 Difference]: Start difference. First operand 2111 states and 7174 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:29,544 INFO L93 Difference]: Finished difference Result 2405 states and 8000 transitions. [2022-01-28 15:00:29,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 15:00:29,545 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:29,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:29,548 INFO L225 Difference]: With dead ends: 2405 [2022-01-28 15:00:29,548 INFO L226 Difference]: Without dead ends: 2374 [2022-01-28 15:00:29,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:00:29,549 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:29,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 260 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 524 Invalid, 0 Unknown, 323 Unchecked, 0.2s Time] [2022-01-28 15:00:29,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2022-01-28 15:00:29,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 2114. [2022-01-28 15:00:29,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 3.4013251301467107) internal successors, (7187), 2113 states have internal predecessors, (7187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:29,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 7187 transitions. [2022-01-28 15:00:29,586 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 7187 transitions. Word has length 24 [2022-01-28 15:00:29,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:29,586 INFO L470 AbstractCegarLoop]: Abstraction has 2114 states and 7187 transitions. [2022-01-28 15:00:29,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:29,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 7187 transitions. [2022-01-28 15:00:29,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:29,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:29,589 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:29,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:29,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2022-01-28 15:00:29,789 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:29,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:29,790 INFO L85 PathProgramCache]: Analyzing trace with hash -457689403, now seen corresponding path program 334 times [2022-01-28 15:00:29,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:29,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331970249] [2022-01-28 15:00:29,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:29,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:29,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:29,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331970249] [2022-01-28 15:00:29,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331970249] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:29,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065197012] [2022-01-28 15:00:29,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:00:29,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:29,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:29,973 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:29,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-01-28 15:00:29,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:00:29,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:29,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:00:29,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:30,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:30,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 15:00:30,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:30,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 15:00:30,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-01-28 15:00:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:30,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:30,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:30,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 71 [2022-01-28 15:00:31,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:31,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2022-01-28 15:00:31,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:31,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2022-01-28 15:00:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:31,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065197012] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:31,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:31,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:00:31,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972361431] [2022-01-28 15:00:31,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:31,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:00:31,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:31,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:00:31,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:31,113 INFO L87 Difference]: Start difference. First operand 2114 states and 7187 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:31,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:31,308 INFO L93 Difference]: Finished difference Result 2348 states and 7851 transitions. [2022-01-28 15:00:31,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:00:31,308 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:31,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:31,313 INFO L225 Difference]: With dead ends: 2348 [2022-01-28 15:00:31,313 INFO L226 Difference]: Without dead ends: 2341 [2022-01-28 15:00:31,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:31,313 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:31,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 259 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 459 Invalid, 0 Unknown, 161 Unchecked, 0.2s Time] [2022-01-28 15:00:31,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2022-01-28 15:00:31,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 2110. [2022-01-28 15:00:31,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2110 states, 2109 states have (on average 3.4049312470365103) internal successors, (7181), 2109 states have internal predecessors, (7181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2110 states to 2110 states and 7181 transitions. [2022-01-28 15:00:31,339 INFO L78 Accepts]: Start accepts. Automaton has 2110 states and 7181 transitions. Word has length 24 [2022-01-28 15:00:31,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:31,340 INFO L470 AbstractCegarLoop]: Abstraction has 2110 states and 7181 transitions. [2022-01-28 15:00:31,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:31,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2110 states and 7181 transitions. [2022-01-28 15:00:31,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:31,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:31,342 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:31,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Ended with exit code 0 [2022-01-28 15:00:31,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2022-01-28 15:00:31,543 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:31,543 INFO L85 PathProgramCache]: Analyzing trace with hash 2073827521, now seen corresponding path program 335 times [2022-01-28 15:00:31,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:31,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454314175] [2022-01-28 15:00:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:31,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:31,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:31,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454314175] [2022-01-28 15:00:31,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454314175] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:31,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793722749] [2022-01-28 15:00:31,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:00:31,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:31,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:31,676 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:31,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-01-28 15:00:31,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 15:00:31,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:31,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:00:31,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:31,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 15:00:31,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:31,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 15:00:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:31,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:32,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:32,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 49 [2022-01-28 15:00:32,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:32,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 55 [2022-01-28 15:00:32,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:32,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2022-01-28 15:00:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:32,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793722749] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:32,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:32,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 15:00:32,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144196068] [2022-01-28 15:00:32,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:32,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:32,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:32,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:32,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:32,485 INFO L87 Difference]: Start difference. First operand 2110 states and 7181 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:32,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:32,753 INFO L93 Difference]: Finished difference Result 2409 states and 7997 transitions. [2022-01-28 15:00:32,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 15:00:32,753 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:32,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:32,757 INFO L225 Difference]: With dead ends: 2409 [2022-01-28 15:00:32,757 INFO L226 Difference]: Without dead ends: 2382 [2022-01-28 15:00:32,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:32,757 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 114 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:32,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 201 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 552 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2022-01-28 15:00:32,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2022-01-28 15:00:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2096. [2022-01-28 15:00:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 3.4090692124105013) internal successors, (7142), 2095 states have internal predecessors, (7142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:32,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 7142 transitions. [2022-01-28 15:00:32,783 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 7142 transitions. Word has length 24 [2022-01-28 15:00:32,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:32,783 INFO L470 AbstractCegarLoop]: Abstraction has 2096 states and 7142 transitions. [2022-01-28 15:00:32,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:32,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 7142 transitions. [2022-01-28 15:00:32,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:32,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:32,786 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:32,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-01-28 15:00:32,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:32,986 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:32,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:32,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1495067879, now seen corresponding path program 336 times [2022-01-28 15:00:32,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:32,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989147147] [2022-01-28 15:00:32,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:32,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:33,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:33,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989147147] [2022-01-28 15:00:33,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989147147] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:33,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436478747] [2022-01-28 15:00:33,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:00:33,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:33,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:33,166 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:33,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-01-28 15:00:33,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:00:33,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:33,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:00:33,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:33,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 15:00:33,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:33,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 15:00:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:33,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:33,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:33,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 47 [2022-01-28 15:00:34,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:34,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2022-01-28 15:00:34,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:34,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2022-01-28 15:00:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:34,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436478747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:34,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:34,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:00:34,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891235715] [2022-01-28 15:00:34,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:34,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:00:34,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:34,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:00:34,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:34,096 INFO L87 Difference]: Start difference. First operand 2096 states and 7142 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:35,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:35,608 INFO L93 Difference]: Finished difference Result 2929 states and 9459 transitions. [2022-01-28 15:00:35,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 15:00:35,609 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:35,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:35,613 INFO L225 Difference]: With dead ends: 2929 [2022-01-28 15:00:35,613 INFO L226 Difference]: Without dead ends: 2781 [2022-01-28 15:00:35,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2022-01-28 15:00:35,614 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 141 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:35,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 396 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 15:00:35,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2022-01-28 15:00:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2096. [2022-01-28 15:00:35,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 3.4138424821002387) internal successors, (7152), 2095 states have internal predecessors, (7152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:35,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 7152 transitions. [2022-01-28 15:00:35,646 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 7152 transitions. Word has length 24 [2022-01-28 15:00:35,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:35,646 INFO L470 AbstractCegarLoop]: Abstraction has 2096 states and 7152 transitions. [2022-01-28 15:00:35,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:35,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 7152 transitions. [2022-01-28 15:00:35,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:35,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:35,649 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:35,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Ended with exit code 0 [2022-01-28 15:00:35,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:35,850 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:35,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:35,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1635966243, now seen corresponding path program 337 times [2022-01-28 15:00:35,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:35,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656473139] [2022-01-28 15:00:35,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:35,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:36,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:36,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656473139] [2022-01-28 15:00:36,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656473139] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:36,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291203450] [2022-01-28 15:00:36,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:00:36,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:36,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:36,024 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:36,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-01-28 15:00:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:36,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:00:36,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:36,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 15:00:36,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 15:00:36,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-28 15:00:36,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 15:00:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:36,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:36,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:36,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 71 [2022-01-28 15:00:36,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:36,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2022-01-28 15:00:36,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:36,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2022-01-28 15:00:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:37,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291203450] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:37,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:37,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:00:37,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99267559] [2022-01-28 15:00:37,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:37,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:00:37,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:37,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:00:37,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:37,071 INFO L87 Difference]: Start difference. First operand 2096 states and 7152 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:37,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:37,954 INFO L93 Difference]: Finished difference Result 2629 states and 8640 transitions. [2022-01-28 15:00:37,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 15:00:37,955 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:37,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:37,959 INFO L225 Difference]: With dead ends: 2629 [2022-01-28 15:00:37,959 INFO L226 Difference]: Without dead ends: 2559 [2022-01-28 15:00:37,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 15:00:37,960 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 101 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:37,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 363 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1079 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:00:37,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2559 states. [2022-01-28 15:00:37,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2559 to 2096. [2022-01-28 15:00:37,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 3.4138424821002387) internal successors, (7152), 2095 states have internal predecessors, (7152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:37,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 7152 transitions. [2022-01-28 15:00:37,997 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 7152 transitions. Word has length 24 [2022-01-28 15:00:37,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:37,997 INFO L470 AbstractCegarLoop]: Abstraction has 2096 states and 7152 transitions. [2022-01-28 15:00:37,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:37,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 7152 transitions. [2022-01-28 15:00:38,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:38,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:38,000 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:38,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:38,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:38,200 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:38,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:38,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1261110975, now seen corresponding path program 338 times [2022-01-28 15:00:38,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:38,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876074775] [2022-01-28 15:00:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:38,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:38,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:38,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876074775] [2022-01-28 15:00:38,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876074775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:38,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961793381] [2022-01-28 15:00:38,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:00:38,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:38,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:38,402 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:38,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-01-28 15:00:38,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:38,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:38,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:00:38,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:38,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:38,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 15:00:39,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:39,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:39,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:39,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 15:00:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:39,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:39,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:39,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 68 [2022-01-28 15:00:39,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:39,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-01-28 15:00:39,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:39,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 54 [2022-01-28 15:00:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:39,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961793381] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:39,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:39,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:00:39,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470057683] [2022-01-28 15:00:39,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:39,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:00:39,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:39,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:00:39,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:39,800 INFO L87 Difference]: Start difference. First operand 2096 states and 7152 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:40,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:40,111 INFO L93 Difference]: Finished difference Result 2230 states and 7523 transitions. [2022-01-28 15:00:40,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:00:40,111 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:40,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:40,115 INFO L225 Difference]: With dead ends: 2230 [2022-01-28 15:00:40,115 INFO L226 Difference]: Without dead ends: 2171 [2022-01-28 15:00:40,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:00:40,116 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 68 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:40,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 224 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 619 Invalid, 0 Unknown, 237 Unchecked, 0.3s Time] [2022-01-28 15:00:40,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2022-01-28 15:00:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2097. [2022-01-28 15:00:40,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2096 states have (on average 3.41412213740458) internal successors, (7156), 2096 states have internal predecessors, (7156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:40,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 7156 transitions. [2022-01-28 15:00:40,141 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 7156 transitions. Word has length 24 [2022-01-28 15:00:40,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:40,141 INFO L470 AbstractCegarLoop]: Abstraction has 2097 states and 7156 transitions. [2022-01-28 15:00:40,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:40,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 7156 transitions. [2022-01-28 15:00:40,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:40,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:40,144 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:40,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Ended with exit code 0 [2022-01-28 15:00:40,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2022-01-28 15:00:40,345 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:40,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:40,345 INFO L85 PathProgramCache]: Analyzing trace with hash -97177801, now seen corresponding path program 339 times [2022-01-28 15:00:40,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:40,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537554268] [2022-01-28 15:00:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:40,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:40,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:40,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537554268] [2022-01-28 15:00:40,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537554268] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:40,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093172301] [2022-01-28 15:00:40,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:00:40,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:40,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:40,539 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:40,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-01-28 15:00:40,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:00:40,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:40,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:00:40,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:40,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:40,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 15:00:41,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:41,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 15:00:41,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:41,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 15:00:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:41,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:41,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:41,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 15:00:41,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:41,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 96 [2022-01-28 15:00:41,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:41,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 72 [2022-01-28 15:00:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:41,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093172301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:41,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:41,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 15:00:41,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419837180] [2022-01-28 15:00:41,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:41,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:41,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:41,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:41,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:41,959 INFO L87 Difference]: Start difference. First operand 2097 states and 7156 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:42,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:42,170 INFO L93 Difference]: Finished difference Result 2218 states and 7499 transitions. [2022-01-28 15:00:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:00:42,170 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:42,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:42,174 INFO L225 Difference]: With dead ends: 2218 [2022-01-28 15:00:42,174 INFO L226 Difference]: Without dead ends: 2183 [2022-01-28 15:00:42,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:42,174 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:42,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 187 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 477 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-01-28 15:00:42,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2183 states. [2022-01-28 15:00:42,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2183 to 2097. [2022-01-28 15:00:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2096 states have (on average 3.41412213740458) internal successors, (7156), 2096 states have internal predecessors, (7156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 7156 transitions. [2022-01-28 15:00:42,198 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 7156 transitions. Word has length 24 [2022-01-28 15:00:42,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:42,198 INFO L470 AbstractCegarLoop]: Abstraction has 2097 states and 7156 transitions. [2022-01-28 15:00:42,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:42,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 7156 transitions. [2022-01-28 15:00:42,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:42,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:42,201 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:42,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Ended with exit code 0 [2022-01-28 15:00:42,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2022-01-28 15:00:42,402 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:42,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:42,402 INFO L85 PathProgramCache]: Analyzing trace with hash -952560131, now seen corresponding path program 340 times [2022-01-28 15:00:42,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:42,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049697878] [2022-01-28 15:00:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:42,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:42,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:42,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049697878] [2022-01-28 15:00:42,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049697878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:42,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916216348] [2022-01-28 15:00:42,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:00:42,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:42,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:42,594 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:42,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-01-28 15:00:42,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:00:42,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:42,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:00:42,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:42,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:42,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 15:00:43,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:43,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-01-28 15:00:43,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:43,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-01-28 15:00:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:43,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:43,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:43,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 15:00:43,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:43,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 96 [2022-01-28 15:00:43,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:43,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 72 [2022-01-28 15:00:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:43,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916216348] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:43,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:43,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:00:43,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885116400] [2022-01-28 15:00:43,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:43,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:00:43,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:43,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:00:43,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:43,957 INFO L87 Difference]: Start difference. First operand 2097 states and 7156 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:44,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:44,137 INFO L93 Difference]: Finished difference Result 2228 states and 7532 transitions. [2022-01-28 15:00:44,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:00:44,137 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:44,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:44,141 INFO L225 Difference]: With dead ends: 2228 [2022-01-28 15:00:44,141 INFO L226 Difference]: Without dead ends: 2197 [2022-01-28 15:00:44,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:44,141 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:44,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 206 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 404 Invalid, 0 Unknown, 318 Unchecked, 0.2s Time] [2022-01-28 15:00:44,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2022-01-28 15:00:44,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 2097. [2022-01-28 15:00:44,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2096 states have (on average 3.41412213740458) internal successors, (7156), 2096 states have internal predecessors, (7156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:44,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 7156 transitions. [2022-01-28 15:00:44,165 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 7156 transitions. Word has length 24 [2022-01-28 15:00:44,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:44,165 INFO L470 AbstractCegarLoop]: Abstraction has 2097 states and 7156 transitions. [2022-01-28 15:00:44,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:44,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 7156 transitions. [2022-01-28 15:00:44,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:44,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:44,168 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:44,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Ended with exit code 0 [2022-01-28 15:00:44,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-01-28 15:00:44,368 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:44,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:44,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1171791359, now seen corresponding path program 341 times [2022-01-28 15:00:44,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:44,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119964505] [2022-01-28 15:00:44,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:44,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:44,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:44,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119964505] [2022-01-28 15:00:44,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119964505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:44,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351612645] [2022-01-28 15:00:44,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:00:44,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:44,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:44,580 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:44,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-01-28 15:00:44,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 15:00:44,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:44,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:00:44,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:44,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:44,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 15:00:45,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:45,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:45,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:45,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-28 15:00:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:45,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:45,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:45,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 15:00:45,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:45,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2022-01-28 15:00:45,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:45,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2022-01-28 15:00:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:46,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351612645] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:46,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:46,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:00:46,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010013273] [2022-01-28 15:00:46,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:46,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:00:46,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:46,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:00:46,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:46,051 INFO L87 Difference]: Start difference. First operand 2097 states and 7156 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:46,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:46,280 INFO L93 Difference]: Finished difference Result 2214 states and 7497 transitions. [2022-01-28 15:00:46,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 15:00:46,280 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:46,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:46,284 INFO L225 Difference]: With dead ends: 2214 [2022-01-28 15:00:46,284 INFO L226 Difference]: Without dead ends: 2183 [2022-01-28 15:00:46,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:00:46,284 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:46,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 159 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 504 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-01-28 15:00:46,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2183 states. [2022-01-28 15:00:46,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2183 to 2097. [2022-01-28 15:00:46,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2096 states have (on average 3.41412213740458) internal successors, (7156), 2096 states have internal predecessors, (7156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:46,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 7156 transitions. [2022-01-28 15:00:46,320 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 7156 transitions. Word has length 24 [2022-01-28 15:00:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:46,320 INFO L470 AbstractCegarLoop]: Abstraction has 2097 states and 7156 transitions. [2022-01-28 15:00:46,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 7156 transitions. [2022-01-28 15:00:46,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:46,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:46,323 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:46,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:46,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-01-28 15:00:46,523 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:46,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:46,524 INFO L85 PathProgramCache]: Analyzing trace with hash 186495283, now seen corresponding path program 342 times [2022-01-28 15:00:46,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:46,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476221230] [2022-01-28 15:00:46,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:46,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:46,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:46,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476221230] [2022-01-28 15:00:46,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476221230] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:46,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676746222] [2022-01-28 15:00:46,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:00:46,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:46,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:46,757 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:46,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-01-28 15:00:46,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:00:46,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:46,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:00:46,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:46,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:46,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 15:00:47,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:47,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 15:00:47,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:47,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 15:00:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:47,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:47,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:47,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2022-01-28 15:00:47,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:47,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 60 [2022-01-28 15:00:47,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:47,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 46 [2022-01-28 15:00:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:48,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676746222] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:48,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:48,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:00:48,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513720022] [2022-01-28 15:00:48,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:48,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:00:48,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:48,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:00:48,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:48,023 INFO L87 Difference]: Start difference. First operand 2097 states and 7156 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:49,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:49,510 INFO L93 Difference]: Finished difference Result 2843 states and 9070 transitions. [2022-01-28 15:00:49,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 15:00:49,510 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:49,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:49,514 INFO L225 Difference]: With dead ends: 2843 [2022-01-28 15:00:49,515 INFO L226 Difference]: Without dead ends: 2670 [2022-01-28 15:00:49,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2022-01-28 15:00:49,515 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 226 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:49,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 313 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 890 Invalid, 0 Unknown, 30 Unchecked, 0.4s Time] [2022-01-28 15:00:49,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2022-01-28 15:00:49,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2098. [2022-01-28 15:00:49,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 2097 states have (on average 3.4148783977110155) internal successors, (7161), 2097 states have internal predecessors, (7161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 7161 transitions. [2022-01-28 15:00:49,544 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 7161 transitions. Word has length 24 [2022-01-28 15:00:49,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:49,544 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 7161 transitions. [2022-01-28 15:00:49,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:49,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 7161 transitions. [2022-01-28 15:00:49,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:49,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:49,547 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:49,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:49,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:49,748 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:49,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:49,748 INFO L85 PathProgramCache]: Analyzing trace with hash 691952691, now seen corresponding path program 343 times [2022-01-28 15:00:49,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:49,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744099556] [2022-01-28 15:00:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:49,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:49,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:49,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744099556] [2022-01-28 15:00:49,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744099556] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:49,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629150626] [2022-01-28 15:00:49,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:00:49,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:49,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:49,991 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:49,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-01-28 15:00:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:50,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:00:50,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:50,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:50,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-01-28 15:00:50,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:50,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-28 15:00:50,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:50,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 15:00:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:50,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:51,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:51,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 84 [2022-01-28 15:00:51,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:51,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2022-01-28 15:00:51,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:51,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2022-01-28 15:00:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:51,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629150626] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:51,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:51,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:00:51,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982503758] [2022-01-28 15:00:51,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:51,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:00:51,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:51,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:00:51,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:51,362 INFO L87 Difference]: Start difference. First operand 2098 states and 7161 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:51,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:51,632 INFO L93 Difference]: Finished difference Result 2212 states and 7468 transitions. [2022-01-28 15:00:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 15:00:51,632 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:51,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:51,636 INFO L225 Difference]: With dead ends: 2212 [2022-01-28 15:00:51,636 INFO L226 Difference]: Without dead ends: 2181 [2022-01-28 15:00:51,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:00:51,636 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:51,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 188 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 556 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2022-01-28 15:00:51,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2022-01-28 15:00:51,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2097. [2022-01-28 15:00:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2096 states have (on average 3.41412213740458) internal successors, (7156), 2096 states have internal predecessors, (7156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 7156 transitions. [2022-01-28 15:00:51,661 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 7156 transitions. Word has length 24 [2022-01-28 15:00:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:51,661 INFO L470 AbstractCegarLoop]: Abstraction has 2097 states and 7156 transitions. [2022-01-28 15:00:51,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:51,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 7156 transitions. [2022-01-28 15:00:51,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:51,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:51,664 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:51,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Ended with exit code 0 [2022-01-28 15:00:51,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2022-01-28 15:00:51,865 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:51,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:51,865 INFO L85 PathProgramCache]: Analyzing trace with hash -557213047, now seen corresponding path program 344 times [2022-01-28 15:00:51,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:51,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594308475] [2022-01-28 15:00:51,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:51,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:52,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:52,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594308475] [2022-01-28 15:00:52,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594308475] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:52,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579658517] [2022-01-28 15:00:52,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:00:52,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:52,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:52,121 INFO L229 MonitoredProcess]: Starting monitored process 345 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:52,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-01-28 15:00:52,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:52,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:52,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:00:52,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:52,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:52,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:52,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:52,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 15:00:52,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:52,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-01-28 15:00:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:52,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:53,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:53,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 15:00:53,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:53,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 60 [2022-01-28 15:00:53,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:53,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 46 [2022-01-28 15:00:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:53,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579658517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:53,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:53,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:00:53,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372221547] [2022-01-28 15:00:53,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:53,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:00:53,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:53,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:00:53,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:53,353 INFO L87 Difference]: Start difference. First operand 2097 states and 7156 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:53,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:53,786 INFO L93 Difference]: Finished difference Result 2318 states and 7732 transitions. [2022-01-28 15:00:53,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:00:53,786 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:53,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:53,790 INFO L225 Difference]: With dead ends: 2318 [2022-01-28 15:00:53,790 INFO L226 Difference]: Without dead ends: 2236 [2022-01-28 15:00:53,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:00:53,791 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 84 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:53,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 235 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 509 Invalid, 0 Unknown, 182 Unchecked, 0.2s Time] [2022-01-28 15:00:53,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2022-01-28 15:00:53,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 2100. [2022-01-28 15:00:53,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 2099 states have (on average 3.4149595045259646) internal successors, (7168), 2099 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:53,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 7168 transitions. [2022-01-28 15:00:53,816 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 7168 transitions. Word has length 24 [2022-01-28 15:00:53,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:53,816 INFO L470 AbstractCegarLoop]: Abstraction has 2100 states and 7168 transitions. [2022-01-28 15:00:53,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:53,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 7168 transitions. [2022-01-28 15:00:53,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:53,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:53,819 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:53,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:54,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:54,019 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:54,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:54,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1405835519, now seen corresponding path program 345 times [2022-01-28 15:00:54,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:54,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546126053] [2022-01-28 15:00:54,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:54,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:54,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:54,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546126053] [2022-01-28 15:00:54,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546126053] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:54,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187297916] [2022-01-28 15:00:54,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:00:54,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:54,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:54,234 INFO L229 MonitoredProcess]: Starting monitored process 346 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:54,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-01-28 15:00:54,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:00:54,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:54,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:00:54,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:54,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:54,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:54,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:54,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 15:00:54,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:54,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 15:00:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:54,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:55,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:55,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 15:00:55,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:55,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 96 [2022-01-28 15:00:55,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:55,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 72 [2022-01-28 15:00:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:55,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187297916] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:55,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:55,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:00:55,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463370780] [2022-01-28 15:00:55,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:55,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:00:55,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:55,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:00:55,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:55,428 INFO L87 Difference]: Start difference. First operand 2100 states and 7168 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:55,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:55,776 INFO L93 Difference]: Finished difference Result 2225 states and 7507 transitions. [2022-01-28 15:00:55,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:00:55,777 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:55,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:55,780 INFO L225 Difference]: With dead ends: 2225 [2022-01-28 15:00:55,780 INFO L226 Difference]: Without dead ends: 2186 [2022-01-28 15:00:55,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:00:55,781 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:55,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 297 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 564 Invalid, 0 Unknown, 183 Unchecked, 0.2s Time] [2022-01-28 15:00:55,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2022-01-28 15:00:55,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2098. [2022-01-28 15:00:55,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 2097 states have (on average 3.4148783977110155) internal successors, (7161), 2097 states have internal predecessors, (7161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:55,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 7161 transitions. [2022-01-28 15:00:55,805 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 7161 transitions. Word has length 24 [2022-01-28 15:00:55,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:55,805 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 7161 transitions. [2022-01-28 15:00:55,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:55,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 7161 transitions. [2022-01-28 15:00:55,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:55,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:55,808 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:55,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Ended with exit code 0 [2022-01-28 15:00:56,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:56,009 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:56,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:56,009 INFO L85 PathProgramCache]: Analyzing trace with hash 915780061, now seen corresponding path program 346 times [2022-01-28 15:00:56,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:56,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663005250] [2022-01-28 15:00:56,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:56,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:56,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:56,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663005250] [2022-01-28 15:00:56,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663005250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:56,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426215835] [2022-01-28 15:00:56,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:00:56,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:56,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:56,242 INFO L229 MonitoredProcess]: Starting monitored process 347 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:56,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-01-28 15:00:56,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:00:56,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:56,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:00:56,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:56,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:56,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:56,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:56,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 15:00:56,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:56,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 15:00:56,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:56,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:57,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:57,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 15:00:57,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:57,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 60 [2022-01-28 15:00:57,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:57,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 46 [2022-01-28 15:00:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:57,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426215835] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:57,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:57,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:00:57,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759259400] [2022-01-28 15:00:57,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:57,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:00:57,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:57,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:00:57,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:57,552 INFO L87 Difference]: Start difference. First operand 2098 states and 7161 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:58,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:58,702 INFO L93 Difference]: Finished difference Result 2544 states and 8331 transitions. [2022-01-28 15:00:58,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 15:00:58,702 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:00:58,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:58,706 INFO L225 Difference]: With dead ends: 2544 [2022-01-28 15:00:58,707 INFO L226 Difference]: Without dead ends: 2433 [2022-01-28 15:00:58,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 15:00:58,707 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 201 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:58,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 226 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 705 Invalid, 0 Unknown, 208 Unchecked, 0.3s Time] [2022-01-28 15:00:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2022-01-28 15:00:58,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 2099. [2022-01-28 15:00:58,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 2098 states have (on average 3.4156339370829363) internal successors, (7166), 2098 states have internal predecessors, (7166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:58,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 7166 transitions. [2022-01-28 15:00:58,733 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 7166 transitions. Word has length 24 [2022-01-28 15:00:58,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:58,733 INFO L470 AbstractCegarLoop]: Abstraction has 2099 states and 7166 transitions. [2022-01-28 15:00:58,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:58,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 7166 transitions. [2022-01-28 15:00:58,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:00:58,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:58,736 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:58,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Ended with exit code 0 [2022-01-28 15:00:58,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:58,936 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:58,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:58,937 INFO L85 PathProgramCache]: Analyzing trace with hash 342855297, now seen corresponding path program 347 times [2022-01-28 15:00:58,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:58,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489129406] [2022-01-28 15:00:58,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:58,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:59,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:59,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489129406] [2022-01-28 15:00:59,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489129406] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:59,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424577054] [2022-01-28 15:00:59,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:00:59,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:59,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:59,125 INFO L229 MonitoredProcess]: Starting monitored process 348 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:00:59,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-01-28 15:00:59,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:00:59,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:59,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:00:59,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:59,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:59,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:59,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:59,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 15:00:59,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:59,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 15:00:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:00:59,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:59,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:59,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 82 [2022-01-28 15:01:00,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:00,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2022-01-28 15:01:00,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:00,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2022-01-28 15:01:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:01:00,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424577054] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:00,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:00,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-01-28 15:01:00,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109054617] [2022-01-28 15:01:00,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:00,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:00,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:00,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:00,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:00,275 INFO L87 Difference]: Start difference. First operand 2099 states and 7166 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:00,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:00,518 INFO L93 Difference]: Finished difference Result 2225 states and 7517 transitions. [2022-01-28 15:01:00,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 15:01:00,518 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:01:00,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:00,531 INFO L225 Difference]: With dead ends: 2225 [2022-01-28 15:01:00,531 INFO L226 Difference]: Without dead ends: 2194 [2022-01-28 15:01:00,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:01:00,531 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:00,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 146 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 483 Invalid, 0 Unknown, 11 Unchecked, 0.2s Time] [2022-01-28 15:01:00,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2022-01-28 15:01:00,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 2098. [2022-01-28 15:01:00,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 2097 states have (on average 3.4148783977110155) internal successors, (7161), 2097 states have internal predecessors, (7161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:00,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 7161 transitions. [2022-01-28 15:01:00,556 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 7161 transitions. Word has length 24 [2022-01-28 15:01:00,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:00,556 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 7161 transitions. [2022-01-28 15:01:00,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:00,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 7161 transitions. [2022-01-28 15:01:00,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:01:00,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:00,559 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:00,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Ended with exit code 0 [2022-01-28 15:01:00,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:00,759 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:00,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:00,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1117186883, now seen corresponding path program 348 times [2022-01-28 15:01:00,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:00,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123392573] [2022-01-28 15:01:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:00,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:01:00,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:00,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123392573] [2022-01-28 15:01:00,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123392573] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:00,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180157688] [2022-01-28 15:01:00,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:01:00,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:00,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:00,984 INFO L229 MonitoredProcess]: Starting monitored process 349 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:01:00,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-01-28 15:01:01,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:01:01,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:01,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:01:01,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:01,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:01,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:01,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:01,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-28 15:01:01,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:01,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-01-28 15:01:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:01:01,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:01,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:01,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 99 [2022-01-28 15:01:02,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:02,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2022-01-28 15:01:02,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:02,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2022-01-28 15:01:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:01:02,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180157688] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:02,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:02,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:01:02,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043424884] [2022-01-28 15:01:02,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:02,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:01:02,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:02,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:01:02,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:01:02,053 INFO L87 Difference]: Start difference. First operand 2098 states and 7161 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:02,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:02,532 INFO L93 Difference]: Finished difference Result 2225 states and 7505 transitions. [2022-01-28 15:01:02,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:01:02,533 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:01:02,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:02,537 INFO L225 Difference]: With dead ends: 2225 [2022-01-28 15:01:02,537 INFO L226 Difference]: Without dead ends: 2186 [2022-01-28 15:01:02,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:01:02,537 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:02,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 351 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 719 Invalid, 0 Unknown, 368 Unchecked, 0.3s Time] [2022-01-28 15:01:02,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2022-01-28 15:01:02,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2098. [2022-01-28 15:01:02,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 2097 states have (on average 3.4148783977110155) internal successors, (7161), 2097 states have internal predecessors, (7161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:02,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 7161 transitions. [2022-01-28 15:01:02,562 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 7161 transitions. Word has length 24 [2022-01-28 15:01:02,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:02,562 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 7161 transitions. [2022-01-28 15:01:02,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:02,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 7161 transitions. [2022-01-28 15:01:02,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:01:02,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:02,565 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:02,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Forceful destruction successful, exit code 0 [2022-01-28 15:01:02,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:02,765 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:02,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:02,765 INFO L85 PathProgramCache]: Analyzing trace with hash 2079355009, now seen corresponding path program 349 times [2022-01-28 15:01:02,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:02,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194926388] [2022-01-28 15:01:02,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:02,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:01:03,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:03,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194926388] [2022-01-28 15:01:03,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194926388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:03,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716389327] [2022-01-28 15:01:03,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:01:03,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:03,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:03,023 INFO L229 MonitoredProcess]: Starting monitored process 350 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:01:03,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-01-28 15:01:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:03,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:01:03,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:03,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:03,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:03,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:03,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 15:01:03,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:03,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 15:01:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:01:03,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:03,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:03,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 15:01:04,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:04,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 60 [2022-01-28 15:01:04,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:04,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 46 [2022-01-28 15:01:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:01:04,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716389327] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:04,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:04,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:01:04,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719886652] [2022-01-28 15:01:04,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:04,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:01:04,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:04,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:01:04,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:01:04,154 INFO L87 Difference]: Start difference. First operand 2098 states and 7161 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:04,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:04,683 INFO L93 Difference]: Finished difference Result 2316 states and 7707 transitions. [2022-01-28 15:01:04,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:01:04,683 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:01:04,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:04,687 INFO L225 Difference]: With dead ends: 2316 [2022-01-28 15:01:04,687 INFO L226 Difference]: Without dead ends: 2234 [2022-01-28 15:01:04,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:01:04,688 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 71 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:04,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 302 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 750 Invalid, 0 Unknown, 162 Unchecked, 0.3s Time] [2022-01-28 15:01:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2022-01-28 15:01:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2102. [2022-01-28 15:01:04,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 2101 states have (on average 3.413136601618277) internal successors, (7171), 2101 states have internal predecessors, (7171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:04,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 7171 transitions. [2022-01-28 15:01:04,711 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 7171 transitions. Word has length 24 [2022-01-28 15:01:04,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:04,711 INFO L470 AbstractCegarLoop]: Abstraction has 2102 states and 7171 transitions. [2022-01-28 15:01:04,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:04,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 7171 transitions. [2022-01-28 15:01:04,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:01:04,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:04,714 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:04,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Ended with exit code 0 [2022-01-28 15:01:04,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2022-01-28 15:01:04,914 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:04,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:04,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1998863999, now seen corresponding path program 350 times [2022-01-28 15:01:04,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:04,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379644076] [2022-01-28 15:01:04,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:04,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 15:01:05,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:05,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379644076] [2022-01-28 15:01:05,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379644076] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:05,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094936094] [2022-01-28 15:01:05,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:01:05,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:05,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:05,161 INFO L229 MonitoredProcess]: Starting monitored process 351 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:01:05,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-01-28 15:01:05,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:01:05,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:05,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:01:05,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:05,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:05,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:05,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:05,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-01-28 15:01:05,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:05,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-01-28 15:01:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 15:01:05,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:06,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:06,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 103 [2022-01-28 15:01:06,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:06,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2022-01-28 15:01:06,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:06,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2022-01-28 15:01:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 15:01:06,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094936094] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:06,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:06,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-28 15:01:06,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768892997] [2022-01-28 15:01:06,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:06,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:01:06,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:06,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:01:06,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:01:06,396 INFO L87 Difference]: Start difference. First operand 2102 states and 7171 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:06,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:06,711 INFO L93 Difference]: Finished difference Result 2239 states and 7512 transitions. [2022-01-28 15:01:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:01:06,711 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:01:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:06,715 INFO L225 Difference]: With dead ends: 2239 [2022-01-28 15:01:06,715 INFO L226 Difference]: Without dead ends: 2186 [2022-01-28 15:01:06,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:01:06,715 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:06,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 207 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 631 Invalid, 0 Unknown, 13 Unchecked, 0.3s Time] [2022-01-28 15:01:06,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2022-01-28 15:01:06,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2098. [2022-01-28 15:01:06,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 2097 states have (on average 3.4148783977110155) internal successors, (7161), 2097 states have internal predecessors, (7161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:06,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 7161 transitions. [2022-01-28 15:01:06,751 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 7161 transitions. Word has length 24 [2022-01-28 15:01:06,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:06,751 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 7161 transitions. [2022-01-28 15:01:06,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 7161 transitions. [2022-01-28 15:01:06,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:01:06,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:06,754 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:06,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Forceful destruction successful, exit code 0 [2022-01-28 15:01:06,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:06,954 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:06,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:06,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1711508523, now seen corresponding path program 351 times [2022-01-28 15:01:06,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:06,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518692591] [2022-01-28 15:01:06,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:06,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-28 15:01:07,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:07,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518692591] [2022-01-28 15:01:07,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518692591] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:07,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019258798] [2022-01-28 15:01:07,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:01:07,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:07,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:07,053 INFO L229 MonitoredProcess]: Starting monitored process 352 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-28 15:01:07,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-01-28 15:01:07,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:01:07,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:07,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:01:07,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:07,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:07,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 Received shutdown request... [2022-01-28 15:01:07,184 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-28 15:01:07,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Ended with exit code 0 [2022-01-28 15:01:07,203 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-28 15:01:07,208 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-28 15:01:07,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 352 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2022-01-28 15:01:07,385 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-1 context. [2022-01-28 15:01:07,386 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-28 15:01:07,387 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-28 15:01:07,387 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-28 15:01:07,389 INFO L732 BasicCegarLoop]: Path program histogram: [351, 6, 4, 3, 3] [2022-01-28 15:01:07,390 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-28 15:01:07,391 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-28 15:01:07,394 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 03:01:07 BasicIcfg [2022-01-28 15:01:07,394 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-28 15:01:07,394 INFO L158 Benchmark]: Toolchain (without parser) took 765084.75ms. Allocated memory was 196.1MB in the beginning and 400.6MB in the end (delta: 204.5MB). Free memory was 155.6MB in the beginning and 300.7MB in the end (delta: -145.1MB). Peak memory consumption was 61.1MB. Max. memory is 8.0GB. [2022-01-28 15:01:07,394 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 196.1MB. Free memory is still 156.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-28 15:01:07,394 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.96ms. Allocated memory is still 196.1MB. Free memory was 155.6MB in the beginning and 154.1MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-01-28 15:01:07,394 INFO L158 Benchmark]: Boogie Preprocessor took 15.55ms. Allocated memory is still 196.1MB. Free memory was 154.0MB in the beginning and 153.0MB in the end (delta: 931.7kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-28 15:01:07,394 INFO L158 Benchmark]: RCFGBuilder took 205.13ms. Allocated memory is still 196.1MB. Free memory was 152.9MB in the beginning and 141.4MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-28 15:01:07,394 INFO L158 Benchmark]: TraceAbstraction took 764840.72ms. Allocated memory was 196.1MB in the beginning and 400.6MB in the end (delta: 204.5MB). Free memory was 140.9MB in the beginning and 300.7MB in the end (delta: -159.8MB). Peak memory consumption was 45.4MB. Max. memory is 8.0GB. [2022-01-28 15:01:07,395 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12ms. Allocated memory is still 196.1MB. Free memory is still 156.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.96ms. Allocated memory is still 196.1MB. Free memory was 155.6MB in the beginning and 154.1MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.55ms. Allocated memory is still 196.1MB. Free memory was 154.0MB in the beginning and 153.0MB in the end (delta: 931.7kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 205.13ms. Allocated memory is still 196.1MB. Free memory was 152.9MB in the beginning and 141.4MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 764840.72ms. Allocated memory was 196.1MB in the beginning and 400.6MB in the end (delta: 204.5MB). Free memory was 140.9MB in the beginning and 300.7MB in the end (delta: -159.8MB). Peak memory consumption was 45.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-1 context. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-1 context. - TimeoutResultAtElement [Line: 101]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-1 context. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∨-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 764.7s, OverallIterations: 367, TraceHistogramMax: 5, PathProgramHistogramMax: 351, EmptinessCheckTime: 0.7s, AutomataDifference: 250.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 41074 SdHoareTripleChecker+Valid, 109.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 41074 mSDsluCounter, 94941 SdHoareTripleChecker+Invalid, 92.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 36968 IncrementalHoareTripleChecker+Unchecked, 177177 mSDsCounter, 9474 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 266172 IncrementalHoareTripleChecker+Invalid, 312614 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9474 mSolverCounterUnsat, 7686 mSDtfsCounter, 266172 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 22697 GetRequests, 11244 SyntacticMatches, 995 SemanticMatches, 10458 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81515 ImplicationChecksByTransitivity, 270.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2114occurred in iteration=349, InterpolantAutomatonStates: 5978, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 7.2s AutomataMinimizationTime, 366 MinimizatonAttempts, 91126 StatesRemovedByMinimization, 363 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4s SsaConstructionTime, 4.3s SatisfiabilityAnalysisTime, 422.8s InterpolantComputationTime, 17084 NumberOfCodeBlocks, 17034 NumberOfCodeBlocksAsserted, 1255 NumberOfCheckSat, 24413 ConstructedInterpolants, 1309 QuantifiedInterpolants, 568912 SizeOfPredicates, 4747 NumberOfNonLiveVariables, 37765 ConjunctsInSsa, 8500 ConjunctsInUnsatCore, 1066 InterpolantComputations, 16 PerfectInterpolantSequences, 8222/17815 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown